There are two right circular cylinders, A and B. The diameter of the base of the cylinder A is twice that of the base of the cylinder B. The height of the cylinder A is half that of the cylinder B. If the radius and the height of the cylinder B are r and h, respectively, what is the absolute value of the difference of the surface areas between the cylinder A and the cylinder B?

A: 4pi r^2

B: 6pi r^2

C: 8pi r^2

D: 10pi r^2

E: 14pi r^2

Please show your working..

also what is the ratio of the surface area of A to B?

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