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Math Help - cylinder

  1. #1
    ADY
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    cylinder

    Hey! - Im Ady, i need your help guys! I need more clarification than help, right... i need to figure out the volume of cylinder so,: Diameter - 10.5m Length - 1695m so we know that volume of cylinder = pi x (radius of base^2) x height or V = pir^2h .........Solution? r = 5.25^2m v = pi x 5.25 x 1695 = pi x 27.56 x1695 = 146,766.0164m^3 This is right? Cheers guys!
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by ADY View Post
    Hey! - Im Ady, i need your help guys! I need more clarification than help, right... i need to figure out the volume of cylinder so,: Diameter - 10.5m Length - 1695m so we know that volume of cylinder = pi x (radius of base^2) x height or V = pir^2h .........Solution? r = 5.25^2m v = pi x 5.25 x 1695 = pi x 27.56 x1695 = 146,766.0164m^3 This is right? Cheers guys!
    V = pi r^2 h = pi (5.25)^2 1695 ~= 146770.3 cubic metres

    RonL
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  3. #3
    ADY
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    thankyou, so what am i doing wrong? i cant get your answer? i can only get mine, where am i going wrong
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  4. #4
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by ADY View Post
    thankyou, so what am i doing wrong? i cant get your answer? i can only get mine, where am i going wrong
    It doesn't look to me like you did anything wrong. I suspect the only difference between your calculation and CaptainBlack's was, perhaps, the number of digits of \pi you used. They are both the same answer to the required number of significant digits.

    -Dan
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  5. #5
    ADY
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    i have figured it...how bizzare! In terms of a Cylinder, the 'length' could this also be termed as 'depth' ?
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  6. #6
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by ADY View Post
    i have figured it...how bizzare! In terms of a Cylinder, the 'length' could this also be termed as 'depth' ?
    It all depends on what axis you are "looking down."

    -Dan
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