Oil cans x and y are right circular cylinders and the height and radius of y are each 5 times those of x. If the oil in can x filled to capacity sells for $1, how much does the oil in y sell for if y is only 1/5th filled? Choose the correct option:
A) $ 25
B) $ 26
C) $ 27
D) $ 28
E) $ 30

Rationale: "formula for vol of a cyl is pi * r ^ 2 * h so vy = 125 * vy y when half filled will cost 25 times x so ans is a"
Answer: A