₹ 7,000 earns ₹ 1,400 as interest at 5% per annum. Then the time in this case is:

1. 5 years

2. 2 years

3. 10 years

4. 4 years

Find the interest and the amount on:

₹ 750 in 3 years 4 months at 10% per annum.

Find the interest and the amount on:

₹ 2,600 in 2 years 3 months at 1% per month.