question_answer

A solid cylinder of diameter 12 cm and height 15 cm is melted and recast into 12 toys in the shape of a right circular cone mounted on a hemisphere. Find the radius of the hemisphere and total height of the toy, if the height of conical part is three times of the radius of the hemisphere.

A)  5 cm, 10 cm

B)  3 cm, 15 cm

C)  6 cm, 18 cm

D)  3 cm, 12 cm

E)  None of these