Question

A solid metallic sphere of diameter 21cm is melted and recast into a number of smaller cones, each of diameter 3.5cm and height 3 cm .find the numbee of cones

Answer 1

given diameter of sphere is 21 cm
radius 21/2

volume of sphere =4/3 ×22/7×(21/2)³
= 4851 cm³

volume of cone 1/3× 22/7×1.75×1.75×3
=9.625

divide= volume of sphere /volume of cone

no of cone formed is =4851/9.625
=> 504


answer