Question

When a pressure of 100 atm is applied to a spherical ball then its volume reduces by 0.01% the bulk modulus of the material of the ball is

Answer 1

Bulk modulus equal to

here 
f= force, 
a=area 
WE KNOW FORCE PER UNIT AREA IS PRESSURE
v=original volume (assume it 100%) , v(change)=change in volume

Answer 2

see the attachement....