banksy wrote:

2. (KP) Can A and can В are both right circular cylinders. The radius of can A is twice the radius of can B, while the height of can A is half the height of can B. If it costs $4.00 to fill half of can B with a certain brand of gasoline, how much would it cost to completely fill can A with the same brand of gasoline?

(A) $1

(B) $2

(C) $4

(D) $8

(E) $16

Let radius of B be r and A be 2r

vol of B=πr^2h

vol of a=4πr^2h (radius= (2r)) == twice the volume of B

To fill 1/2 of B it cost 4$

to fill B it cost 8 $

to fill 2b ie (a) it cost 16$