The perimeter of the triangular base of a right prism is 20 cm and radius of the in-circle of the triangular base is 4 cm. If the volume of the prism be 480 cm3, then the height of the prism is
1
9 cm
2
8.5 cm
3
15 cm
4
12 cm
The perimeter of the triangular base of a right prism is 20 cm and radius of the in-circle of the triangular base is 4 cm. If the volume of the prism be 480 cm3, then the height of the prism is