Example 10. A sum invested at compound interest amounts to Rs8800 in 1 year and to Rs10648` in 3 years.Calculate the rate per cent and the sum.

A sum of money, invested at compound interest, amounts to Rs 16,500 in 1 year and to Rs 19,965 in 3 years. Find the rate per cent and the original sum of money invested.

A sum of money invested at compound interest amounts to Rs800 in 3 years and to Rs840 in 4 years.The rate of interest per annum is

A sum of money on compound interest amount to Rs. 9680 in 2 years and to Rs. 10648 in 3 years. What is the rate of interest per annum?

A sum of money at compound interest amounts to Rs. 4050 in one year and to Rs. 4723.92 in 3 years. Find the rate of interest per annum.

Sum of money invested at compound interest amounts to Rs. 4624 in 2 years and Rs. 4913 in 3 years. The sum of money is-

A sum of money invested at compound interest amounts in 3 years to ₹ 2400 and in 4 years to ₹ 2520. The interest rate per annum is