Question

A certain sum of money at compound interest becomes rupees 2205 in 2 years and Rupees 2315.25 in 3 years .find the rate of interest per cent per annum.

Answer 1

interest of one year= 2315.25-2205=110.25


so, rate of interest=
$\frac{110.25}{2205} \times 100 = 5\%$