Section 9.3

Computing Volumes

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Problem 3533

Find the volume bounded by the surfaces x+y+z=6x+y+z=6, x=0x=0, z=0z=0, x+2y=4x+2y=4.

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Problem 3534

Find the volume bounded by the surfaces x−y+z=6x-y+z=6, x+y=2x+y=2, x=yx=y, y=0y=0, z=0z=0.

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Problem 3535

Find the volume bounded by the surfaces x+y+z=6x+y+z=6, x=yx=y, y=0y=0, x=3x=3, z=0z=0.

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Problem 3536

Find the volume bounded by the surfaces z=a+xz=a+x, z=−x−az=-x-a, x2+y2=a2x^{2}+y^{2}=a^{2}.

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Problem 3537

Find the volume bounded by the surfaces z2=xyz^{2}=xy, x=ax=a, y=by=b, z=0z=0.

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Problem 3538

Find the volume bounded by the surfaces x+y+z=ax+y+z=a, 3x+y=a3x+y=a, 3x+2y=2a3x+2y=2a, y=0y=0, z=0z=0.

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Problem 3539

Find the volume bounded by the surfaces x+y+z=ax+y+z=a, x2+y2=b2x^{2}+y^{2}=b^{2}, z=0z=0; a>b2a>b\sqrt{2}.

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Problem 3540

Find the volume bounded by the surfaces x2a2+z2c2=1\dfrac {x^{2}}{a^{2}}+\dfrac {z^{2}}{c^{2}}=1, y=baxy=\dfrac {b}{a}x, y=0y=0, z=0z=0; x>0x>0.

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Problem 3541

Find the volume bounded by the surface x2z2+a2y2=c2x2x^{2}z^{2}+a^{2}y^{2}=c^{2}x^{2}, 0<x<a0<x<a.

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Problem 3542

Find the volume bounded by the surfaces y2+z2=xy^{2}+z^{2}=x, x=yx=y; z>0z>0.

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Problem 3543

Find the volume bounded by the surfaces z=x2+y2z=x^{2}+y^{2}, y=x2y=x^{2}; 0<y<10<y<1, z=0z=0.

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Problem 3544

Find the volume bounded by the surfaces z=cos⁡xcos⁡yz=\cos x \cos y; ∣x+y∣<π2\left|x+y\right|<\dfrac {\pi }{2}, z=0z=0.

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Problem 3545

Find the volume bounded by the surfaces z=sin⁡(x2+y2)z=\sin (x^{2}+y^{2}), z=0z=0; nπ<x2+y2<(n+1)πn\pi <x^{2}+y^{2}<(n+1)\pi.

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Problem 3546

Find the volume bounded by the surfaces x2+y2=czx^{2}+y^{2}=cz, x2+y2=axx^{2}+y^{2}=ax, z=0z=0.

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Problem 3547

Find the volume bounded by the surfaces x2+y2=2axx^{2}+y^{2}=2ax, z=αzz=\alpha z, z=βxz=\beta x; α<β\alpha <\beta.

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Remark.
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The plane surface "z=αzz=\alpha z" is reproduced verbatim from the source's own printed text (by sense it should be a family of planes tilted with respect to the xx-axis, analogous to z=βxz=\beta x); this may be a typo in the original.

Problem 3548

Find the volume bounded by the surfaces x2+y2=αz2x^{2}+y^{2}=\alpha z^{2}, x2+y2=axx^{2}+y^{2}=ax; z>0z>0.

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Problem 3549

Find the volume bounded by the surfaces x2+y2=azx^{2}+y^{2}=az, x+z=2ax+z=2a.

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Problem 3550

Find the volume bounded by the surfaces cz=xycz=xy, x2+y2=axx^{2}+y^{2}=ax, z=0z=0; y>0y>0.

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Problem 3551

Find the volume bounded by the surfaces z=x2+y2z=x^{2}+y^{2}, z=x+yz=x+y.

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Problem 3552

Prove that the volume bounded by the plane z=mx+ny+pz=mx+ny+p and the paraboloid z=x2+y2z=x^{2}+y^{2} equals half the area of the circle x2+y2=mx+cy+px^{2}+y^{2}=mx+cy+p, multiplied by the difference of the quantities x2+y2x^{2}+y^{2} and mx+cy+pmx+cy+p, taken at the center of that circle.

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Problem 3553

Prove that the volume of the segment cut off by a plane from an elliptic paraboloid equals the area of the base of the segment, multiplied by half the height of the segment.

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Problem 3554

A part is cut from a circular cone with base radius RR and height HH by a plane parallel to the axis of the cone. Determine the volume of the cut-off part, if the segment at the base corresponds to a central angle 2α2\alpha.

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Problem 3555

A right prism with a square base (of side aa) and height HH is intersected by a circular cone in such a way that its trace on one base is the circle inscribed in the base, and on the other base is the circle circumscribed about it. What fraction of the volume of the prism lies outside the cone?

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Problem 3556

A right hexagonal prism (a nut) with face width aa is intersected by a coaxial conical surface whose generator makes an angle α=60∘\alpha =60^{\circ } with the axis. Determine the volume between the lateral surface of the prism, its base, and the cone, if the cone intersects the base along the circle inscribed in the base. In the following problems, as in some of the preceding ones, it is useful to introduce polar coordinates.

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Problem 3557

Find the volume bounded by the surfaces x2+y2=czx^{2}+y^{2}=cz, x4+y4=a2(x2+y2)x^{4}+y^{4}=a^{2}(x^{2}+y^{2}), z=0z=0.

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Problem 3558

Find the volume bounded by the surfaces z2=2xyz^{2}=2xy, (x2+y2)2=2a2xy(x^{2}+y^{2})^{2}=2a^{2}xy, z=0z=0; x>0x>0, y>0y>0.

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Problem 3559

Find the volume bounded by the surfaces x2+y2+z2=a2x^{2}+y^{2}+z^{2}=a^{2}, (x2+y2)2=a2(x2−y2)(x^{2}+y^{2})^{2}=a^{2}(x^{2}-y^{2}).

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Problem 3560

Find the volume bounded by the surfaces x2+y2+z2=a2x^{2}+y^{2}+z^{2}=a^{2}, x2+y2>∣ax∣x^{2}+y^{2}>\left|ax\right|. (Viviani's problem.)

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Problem 3561

Find the volume bounded by the surfaces z=x2+y2z=x^{2}+y^{2}, z2=xyz^{2}=xy; x>0x>0, y>0y>0.

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Problem 3562

Find the volume bounded by the surfaces z(x+y)=ax+byz(x+y)=ax+by, z=0z=0; 1<x2+y2<41<x^{2}+y^{2}<4, x>0x>0, y>0y>0, a>0a>0, b>0b>0.

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Problem 3563

Prove that the volume of the body bounded by the surfaces:

z=0,x2+y2=c2,z(φ(x)+φ(y))=aφ(x)+bφ(y), z=0, \qquad x^{2}+y^{2}=c^{2}, \qquad z(\varphi (x)+\varphi (y))=a\varphi (x)+b\varphi (y),

where φ(x)\varphi (x) is any positive integrable function, a>0a>0 and b>0b>0, equals 12πc2(a+b)\dfrac {1}{2}\pi c^{2}(a+b).

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Problem 3564

Prove that the volume bounded by the surfaces z=0z=0 and z=e−x2−y2z=e^{-x^{2}-y^{2}} equals π\pi.

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Problem 3565

By a linear change of variables, find the volume enclosed between the surfaces z=0z=0 and z=Ae−(ax2+bxy+cy2)z=Ae^{-(ax^{2}+bxy+cy^{2})}, where a>0a>0, b2−4ac<0b^{2}-4ac<0.

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Problem 3566

Find the volume bounded by the surfaces x2p+y2q=2z\dfrac {x^{2}}{p}+\dfrac {y^{2}}{q}=2z, x2a2+y2b2=1\dfrac {x^{2}}{a^{2}}+\dfrac {y^{2}}{b^{2}}=1, z=0z=0.

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Problem 3567

Find the volume bounded by the surfaces cz=xycz=xy, x2a2+y2b2=1\dfrac {x^{2}}{a^{2}}+\dfrac {y^{2}}{b^{2}}=1, z=0z=0; x>0x>0, y>0y>0.

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Problem 3568

Find the volume bounded by the surface (x2a2+y2b2)2+z2c2=1\left(\dfrac {x^{2}}{a^{2}}+\dfrac {y^{2}}{b^{2}}\right)^{2}+\dfrac {z^{2}}{c^{2}}=1.

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Problem 3569

Find the volume bounded by the surface (x2a2+y2b2)k+zc=1\left(\dfrac {x^{2}}{a^{2}}+\dfrac {y^{2}}{b^{2}}\right)^{k}+\dfrac {z}{c}=1; z>0z>0; k>0k>0.

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Problem 3570

Find the volume bounded by the surfaces x2a2+y2b2=z2c2\dfrac {x^{2}}{a^{2}}+\dfrac {y^{2}}{b^{2}}=\dfrac {z^{2}}{c^{2}}, x2a2+y2b2=xh\dfrac {x^{2}}{a^{2}}+\dfrac {y^{2}}{b^{2}}=\dfrac {x}{h}; z>0z>0.

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Problem 3571

Find the volume bounded by the surfaces x2a2+y2b2=zc\dfrac {x^{2}}{a^{2}}+\dfrac {y^{2}}{b^{2}}=\dfrac {z}{c}, x4a4+y4b4=x2a2+y2b2\dfrac {x^{4}}{a^{4}}+\dfrac {y^{4}}{b^{4}}=\dfrac {x^{2}}{a^{2}}+\dfrac {y^{2}}{b^{2}}, z=0z=0.

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Problem 3572

Find the volume bounded by the surfaces z2=2xyz^{2}=2xy, (x2a2+y2b2)2=2xyc2\left(\dfrac {x^{2}}{a^{2}}+\dfrac {y^{2}}{b^{2}}\right)^{2}=\dfrac {2xy}{c^{2}}; x>0x>0, y>0y>0, z>0z>0.

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Problem 3573

Find the volume bounded by the surfaces x2a2+y2b2=zc\dfrac {x^{2}}{a^{2}}+\dfrac {y^{2}}{b^{2}}=\dfrac {z}{c}, xa+zc=2\dfrac {x}{a}+\dfrac {z}{c}=2.

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Problem 3574

Find the volume bounded by the surface (xa+yb)2+z2c2=1\left(\dfrac {x}{a}+\dfrac {y}{b}\right)^{2}+\dfrac {z^{2}}{c^{2}}=1; x>0x>0, y>0y>0, z>0z>0.

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Problem 3575

Find the volume bounded by the surface (xa+yb)4+z2c2=1\left(\dfrac {x}{a}+\dfrac {y}{b}\right)^{4}+\dfrac {z^{2}}{c^{2}}=1; x>0x>0, y>0y>0, z>0z>0.

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Problem 3576

Find the volume bounded by the surfaces z=xx+yyz=x\sqrt{x}+y\sqrt{y}, x+y=1x+y=1; x>0x>0, y>0y>0, z>0z>0.

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Problem 3577

Find the volume bounded by the surfaces z2=xyz^{2}=xy, x+y=1x+y=1; z>0z>0.

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Problem 3578

Find the volume bounded by the surfaces cz=xycz=xy, (xa+yb)4=xyab\left(\dfrac {x}{a}+\dfrac {y}{b}\right)^{4}=\dfrac {xy}{ab}; x>0x>0, y>0y>0, z>0z>0.

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Problem 3579

Find the volume bounded by the surfaces (xa+yb)2+z2c2=1\left(\dfrac {x}{a}+\dfrac {y}{b}\right)^{2}+\dfrac {z^{2}}{c^{2}}=1, (xa+yb)2=xa\left(\dfrac {x}{a}+\dfrac {y}{b}\right)^{2}=\dfrac {x}{a}; y>0y>0, z>0z>0.

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Problem 3580

Find the volume bounded by the surface

((xa)2/3+(yb)2/3)3+(zc)2=1. \left(\left(\frac{x}{a}\right)^{2/3}+\left(\frac{y}{b}\right)^{2/3}\right)^{3}+\left(\frac{z}{c}\right)^{2}=1.
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Problem 3581

Find the volume bounded by the surface (xa+yb)8+(zc)2=1\left(\sqrt{\dfrac {x}{a}}+\sqrt{\dfrac {y}{b}}\right)^{8}+\left(\dfrac {z}{c}\right)^{2}=1; x>0x>0, y>0y>0, z>0z>0.

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Problem 3582

Find the volume bounded by the surface (xa+yb)4+(zc)2=1\left(\sqrt{\dfrac {x}{a}}+\sqrt{\dfrac {y}{b}}\right)^{4}+\left(\dfrac {z}{c}\right)^{2}=1; x>0x>0, y>0y>0, z>0z>0.

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Problem 3583

Find the volume bounded by the surfaces z=ye−xya2z=ye^{-\frac{xy}{a^{2}}}, xy=a2xy=a^{2}, xy=2a2xy=2a^{2}, y=my=m, y=ny=n, z=0z=0.

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Remark.
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In method of solution, this problem and those up to and including 3588 are close to problems 3521--3530 of this same section.

Problem 3584

Find the volume bounded by the surfaces cz=xycz=xy, y2=mxy^{2}=mx, y2=nxy^{2}=nx, x=αyx=\alpha y, x=βyx=\beta y, z=0z=0.

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Problem 3585

Find the volume bounded by the surfaces z2=xyz^{2}=xy, xy=a2xy=a^{2}, xy=4a2xy=4a^{2}, x=2yx=2y, x=3yx=3y, z=0z=0.

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Problem 3586

Find the volume bounded by the surfaces cz=xycz=xy, y2=2xy^{2}=2x, y2=3xy^{2}=3x, x2=yx^{2}=y, x2=2yx^{2}=2y, z=0z=0.

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Problem 3587

Find the volume bounded by the surfaces z2=xyz^{2}=xy, xy=1xy=1, xy=4xy=4, y2=xy^{2}=x, y2=3xy^{2}=3x, z=0z=0.

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Problem 3588

Find the volume bounded by the surfaces z=x2yz=x^{2}y, y2=a2−2axy^{2}=a^{2}-2ax, y2=m2+2mxy^{2}=m^{2}+2mx, y=0y=0, z=0z=0.

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