Mrs. Rao deposited ₹ 250 per month in a recurring deposit account for a period of 3 years. She received ₹ 10,110 at the time of maturity. Find:

(a) the rate of interest.

(b) how much more interest Mrs. Rao will receive if she had deposited ₹50 more per month at the same rate of interest and for the same time.

Mr. Anil has a recurring deposit account. He deposits a certain amount of money per month for 2 years. If he received an interest whose value is the double of the deposit made per month, then find the rate of interest.

In a recurring deposit (R.D.):

1. a person gets the same interest every month

2. a person gets the same maturity amount every year

3. a person deposits the same amount every month

4. the government deposits an amount equal to the interest every year.