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Math Help - Problem Finding Volume of Revolution

  1. #1
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    Problem Finding Volume of Revolution

    Hello,
    I have worked this question on finding the volune of revolution.. but i think there is something wrong..
    I have posted the question + my works up to the answer.

    Can anyone check it and let me know if its good please?
    I have to submit it in 12 hours time.

    The question:


    My answer:



    Should i use this formula ?if yes how do i apply it here...

    Formula:


    Thanks in advance..
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  2. #2
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    you did everything fine until the very end ... you added when you should have subtracted.
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  3. #3
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    Hello.. where i have added instead of subtracted please?

    I cant figure it out..
    thx
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  4. #4
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    1041.667 - 625 \neq 1666.667
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  5. #5
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    ohhhhhhhhhhh...
    lol ..
    thanks a lot man :P

    thx..
    problem solveD:P
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