Question 277301
volume of a cylinder = area of base * height = pi*r^2 * height
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we are told volume = 91 and r=4
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91 = pi(4^2) * h
91 = pi(16) * h
91 = 16pi * h
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dividing by 16*pi
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91/(16*pi) = h
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so the height is about 17.8678 in.
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done