A solid sphere of radius 15 cm is melted and recast into solid right circular cones of radius 2.5 cm and height 8 cm. Calculate the number of cones recast.
Number of cones = Volume of solid spheres/Volume of 1 cone
= 4/3π(15)^{3)}/1/3π(2.5)^{2} × 8
= 4 × 15 × 15 × 15/2.5 × 2.5 × 8
= 180