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October 21, 2025, 09:07:15 pm
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Author Topic: Help with solids of revolution  (Read 857 times)  Share 

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KeyMan

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Help with solids of revolution
« on: June 15, 2009, 07:07:33 pm »
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Ok, the first part of this question is relatively easy but the second part I'm not quite sure of on how to approach it.


Using symmetry of the circle, this is what I have so far, please comment on whether I'm on the right track or if it's totally wrong from the very start.


EDIT-woops, realised I left out the 2 pi in front of all those integrals
« Last Edit: June 15, 2009, 07:22:35 pm by KeyMan »
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TonyHem

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Re: Help with solids of revolution
« Reply #1 on: June 15, 2009, 08:03:10 pm »
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got no time to type stuff up now but heres the worked solutions for that q
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evaporade

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Re: Help with solids of revolution
« Reply #2 on: June 15, 2009, 08:03:26 pm »
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Find def integ 116-x^2 and def integ 20sqrt(16-x^2).
Don't forget to subtract the donut hole.
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