math
posted by Christine
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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