₹ 4000 amounts to ₹ 4600 in one year at compound interest compounded yearly. The rate of interest is :

1. 15%

2. 12%

3. 10%

4. 20%

₹ 4000 amounts to ₹ 5017.60 in two months at compound interest compounded per month. The rate of interest per month is :

1. 12%

2. 15%

3. 10%

4. 20%

Calculate the amount, if ₹ 15000 is lent at compound interest for 2 years and the rates for the successive years are 8% p.a. and 10% p.a. respectively.

Calculate the compound interest accrued on ₹ 6000 in 3 years, compounded yearly, if the rates for the successive years are 5%, 8% and 10% respectively.