Question

A metallic solid ball of radius 28cm is melted and converted into small solid balls of radius 7cm each.find the number of small balls so formed

Answer 1

Answer:

Volume of metallic solid ball Vm = 4/3*pi*R^3

= 4/3*pi*28^3

Volume of small solid balls

VI = 4/3*pi^r^3 = 4/3*pi*7^3

Let number of solid by spheres formed = n

n*VI = Vm

n = (4/3*pi*28^3) /(4/3*pi*r^3)

n = 28*28*28/7*7*7

n = 64

hope you understood

Answer 2

Answer:

Hence the solid sphere can be melted in 672 smaller cones .