Answer)

Let,
age of Harish as H

age of krish as K,two years ago thier age will be ,H-2 and K-2
and two years later their age will be H+2 and K+2

now as per question

=>H-2 = 3*(K-2)

=>H+2=2*(K+2)

ON Solving the equations, K=6

SO the present age of Krish will be 6 years