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20 September, 16:50

The volume of a cylinder is 225 cm and it's height is 9 cm. What is the length of the cylinders radius.

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  1. 20 September, 18:43
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    225pi=a*9

    divide both sides by 9

    25pi=a

    a=pir^2

    25pi=pir^2

    cancel out pi

    25=r^2

    so the length of the radius is 5
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