Problem: if a solid sphere of radius 10 cms is moulded into 8 spherical solid balls of equal radius , then surface area of each ball ( in sq . cm ) is ? 
Options: ['a ) 100 π', 'b ) 101 / π', 'c ) 99 π / 12', 'd ) 54 / 13 π', 'e ) 22 / 10 π']
a