Rahul and Mohit invested Rs. 16000 and Rs. 20000 in a business. After four months Rahul and Mohit both added Rs. 4000 in their initial investment. At the end of one year the total profit was Rs. 1,55,000. If Rahul and Mohit invested their profit share on compound interest at the rate of 20% and 10% respectively then find difference between interests got by both at the end of the two years?