A man saves ₹ 5,000 every year and invests it at the end of the year at 10% p.a. compound interest. Calculate the total amount of his savings at the end of the third year.

The compound interest compounded annually, on a certain sum is ₹ 29,040 in second year and is ₹ 31,944 in third year.Calculate:

(i) the rate of interest.

(ii) the interest for 4th year.

(iii) the interest for 1st year.