Question

Calculate the work done in dividing a water drop of radius 1cm into 8 small drops

Answer 1

Radius of one water drop   R = 1 Cm
Thus
Volume of 1 water drop = 4/3 pi R^3
                                      = 4/3 * 22/7
                                      = 88/21 Cm^3

Work Done  = dV/dR
                    = 1/8 * 4 pi R^2
                      = pi/2 * R^2
                      = 11/7