A sum of Rs. 12,500 amounts to Rs. 15,500 in 4 years on simple interest. What is the rate of interest on the sum?
5%
4%
6%
2%
S.I. = Rs. (15500 - 12500) = Rs. 3000
∴ Rate = 100×300012500×4% = 6%
A sum of money at simple interest amounts to Rs. 1000 in 4 years and to Rs. 1050 in 5 years. What is the sum?