Number of droplets (n) are combined isothermally to form a big drop the ratio of initial and final surface energies of the system is

Explanation

`(u_(i))/(u_(f))=(n(4pir^(2))T)/((4piR^(2))T)=(nr^(2))/(R^(2))=(nr^(2))/((n^((1)/(3))r)^(2))=n^((1)/(3)):1`