math

two cylindrical tanks have the same height, but the radius of one tank equals the diameter of the other. if the volume of the larger is k% more than the volume of the smaller, k= ?

a)50
b)100
c)200
d)300
e)400


small tank volume: pi*(r/2)^2*h
big tank volume: pi*r^2*h

factor small volume out =
pi*(r^2/4)*h

since big volume is 4 times as the small one, it's 300% more.
(4 is 3 more than 1).

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asked by Christine

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