Interest =P×r×t100
Mr Kumar invested a sum of Rs. 15000 at 6% p.a. simple interest and another amount at 8% p.a. simple interest. The total interest earned at the end of one year on the total amount invested becomes 7% p.a. Find the total amount invested.
Sunil invested Rs 5,000 for 3 years at a certain rate of interest compounded annually, which at the end of first year amounts to Rs 5,600. The rate of interest p.a. is