If a metallic cone of radius 30 cm and height 45 cm is melted and recast into metallic spheres of radius 5 cm, find the number of spheres.

Options

A. 81
B. 41
C. 80
D. 40

Answer

A

Explanation

गोलों की संख्या `= ((1)/(3)xxpi xx 30^(2)xx5)/((4)/(3)xx pi xx 5^(3))=(1)/(4)xx(900xx45)/(125)=81`