Calculus rotation question
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Calculus rotation question

[From: ] [author: ] [Date: 12-02-12] [Hit: ]
but thats said to be wrong.my r = (sqrt16y)-Gee, I got 19.53125 using your same R and r, respectively 5 and √(16y).The 25y -8y² evaluated (y=0 to 25/16) should give the answer.......
Find the volume V of the solid obtained by rotating the region bounded by the given curves about the specified lines.
Y = (1/16)(x^2) x = 5 y = 0
About the y-axis

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I did pi R ^2 - pi r ^2 in the integrals from 0 to 1.5625 and got 61.35923, but that's said to be wrong.
My R = (5)
my r = (sqrt16y)

-
Gee, I got 19.53125 using your same R and r, respectively 5 and √(16y).

The 25y -8y² evaluated (y=0 to 25/16) should give the answer.
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Sorry, forgot to mult by π. I got EXACTLY your answer. I (tentatively)
think it's right.
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keywords: rotation,Calculus,question,Calculus rotation question
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