If the radius of a cylinder is doubled and so is the height, what is the new volume of the cylinder divided by the old one?	Choose the correct choice from the following options: A) 8. B) 2 C) 6 D) 4 E) 10
let the radius be r and the the height be h.   New radius = 2r and height = 2h.   Area (new) : Area(old) = pi∗(2r)^2∗2h/pi∗r^2∗h = 8:1.   Hence the answer is 8..
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If the radius of a cylinder is doubled and so is the height, what is the new volume of the cylinder divided by the old one?