A solid cylinder of height 20 cm and diameter 10 cm is melt and recast into two cones whose volume, are in the ratio of 1 : 2 by keeping each of their height 20cm. The ratio of the volume of the original cylinder of that of the bigger cone is

A

3 : 2

B

$$\pi$$ : 3

C

2 : $$\pi$$

D

3 : 5