A man gets ₹ 1,404 as interest at the end of one year. If the rate of interest is 12% per annum in R.D. account, the monthly installment is :

1. ₹ 1200

2. ₹ 1800

3. ₹ 2400

4. ₹ 3600

Manish opened an R.D. account in a bank and deposited ₹ 1000 per month at the interest of 10% per annum and for 2 years. The total money deposited by him is :

1. ₹ 12,000

2. ₹ 24,000

3. ₹ 2,400

4. ₹ 4,000

₹ 800 per month is deposited in an R.D. account for one and half years. If the depositor gets ₹ 2,280 as interest at the time of maturity, the rate of interest is :

1. 20%

2. 15%

3. 10%

4. 12%