If ₹ 6000 earns C.I. = ₹ 1200 in 6 months; then the rate of interest per year is :

1. 40%

2. 15%

3. 20%

4. 24%

On a certain sum, the S.I. for 2 years is ₹ 2400. If the rate of interest is 10% p.a., then :

C.I. for 2nd year is :

1. ₹ 1320

2. ₹ 2640

3. ₹ 1980

4. ₹ 2400

On a certain sum, the S.I. for 2 years is ₹ 2400. If the rate of interest is 10% p.a., then :

the sum is :

1. ₹ 12000

2. ₹ 26400

3. ₹ 13200

4. ₹ 24000