Rohit borrows ₹ 62,500 from Arun for 2 years at 10% per annum, simple interest. He immediately lends out this sum to Kunal at 10% per annum for the same period, compounded annually. Calculate Rohit's profit in the transaction at the end of two years.

A man invests ₹ 10,000 for 3 years at a certain rate of interest, compounded annually. At the end of one year, it amounts to ₹ 11,200. Calculate :

(i) the rate of interest per annum;

(ii) the interest accrued in the second year;

(iii) the amount at the end of the third year.

Sudhakar borrows ₹ 22,500 at 10% per annum, compounded annually. If he repays ₹ 11,250 at the end of first year and ₹ 12,550 at the end of the second year, find the amount of loan outstanding against him at the end of the third year.

A man borrows ₹ 15,000 at 12% per annum, compounded annually. If he repays ₹ 4,400 at end of each year, find the amount outstanding against him at the beginning of third year.