₹ 10000 amounts to ₹ 12500 in one year. The rate of interest per year is :

1. 15%

2. 12.5%

3. 20%

4. 25%

The C.I. on ₹ 16000 in 2 years at the rate of 20% per annum is :

1. ₹ 19360

2. ₹ 7040

3. ₹ 23040

4. ₹ 22400

The difference between C.I. and S.I. in 2 years as given above for parts (c) and (d) is :

1. ₹ 640

2. ₹ 3840

3. ₹ 1920

4. ₹ 1280

The difference between simple interest and compound interest on a certain sum is ₹ 54.40 for 2 years at 8 percent per annum. Find the sum.