A man has a 5 year recurring deposit account in a bank and deposits ₹ 240 per month. If he recieves ₹ 17,694 at the time of maturity, find the rate of interest.

Sheela has a recurring deposit account in a bank of ₹ 2000 per month at the rate of 10% per annum. If she gets ₹ 83100 at the time of maturity, find the total time (in years) for which the account was held.

By investing ₹ 10,000 in the shares of a company, a man gets an income of ₹ 800; the dividend being 10%. If the face-value of each share is ₹ 100, find :

(i) the market value of each share.

(ii) the rate percent which the person earns on his investment.