Question

A spherical metallic ball of radius 20 cm is melted and small metallic balls of radius 8 mm are made. The total number of possible small metallic balls are:
A) 8000
B) 12500
C) 15625
D) 10000

Answer 1

no of metal ball=4/3×π(20)^3÷4/1×π(0.8)^3

=8000÷.512×10^3

=15625Ans.