Two oil cans, X and Y, are right circular cylinders, and the height and the radius of Y are each twice those of X. If the oil in can X, which is filled to capacity, sells for $2, then at the same rate, how much does the oil in can Y sell for if Y is filled to only half its capacity?

(A) $1

(B) $2

(C) $3

(D) $4

(E) $8

Ans: E.

Mine is D.

assume Y's radiu is R, height is H

X's radiu is r, height is h

Y's capacity is 4 times as X's

s Y's oil worth $2*4=8, then half capacity gives $4, which is answer D.

how comes to E??

NN, pls take a look and help, thanks a lot

Ｙ的高度和半径都是Ｘ的两倍　那么Ｙ的底面积是Ｘ的４倍　容积是Ｘ的８倍　

Ｘ卖＄２　１／２的Ｙ应该卖＄２＊８＊１／２＝８　

所以是Ｅ