Question

A solid metallic sphere of diameter 21 cm is melted and recast into a number of smaller cones each of diameter 7 cm and height 3 cm find the height of cone so formed

Answer 1

put, volume of sphere=volume of cone...

Answer 2

Answer:

vol. of sphere =vol. of cone *n    [ *  = multiply]

n = no. of cones

4/3*22/7*21/2*21/2*21/2 =1/3*22/7*9*7 *n

11*21*21 = 22*3*n

4851=  66*n

4851/66 =n

73.5 =n

Step-by-step explanation: