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Math Help - urgent, calculus problem

  1. #1
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    urgent, calculus problem

    The problem is as follows

    "Consider the solid obtained by rotating the region bounded by the given curves about the x-axis.

    y=5/x, x=8, x=16, y=0

    Find the volume V of this solid."

    For a solution I get

    5*pi*ln(2)

    Is this correct? I am asking because i've done the problem multiple times and am submitting it electronically for homework but it won't accept it or any other simplified form.

    Thanks in advance.
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  2. #2
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    skeeter's Avatar
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    try again ... you forgot to square the radius of your "disk" ...

    V = \pi \int_8^{16} \frac{25}{x^2} \, dx
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  3. #3
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    Wow I can't believe I oversaw that thank you so much.
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