At simple interest a sum becomes `(49)/(40)` of itself in `2 1/2` years. The rate of interest per annum is (a) 7% (b) 8% (c) 12% (d) 9%

At simple interest s sum become 49/40 itself in 2.1/2 years. The rate of interest per annum is

A person lent out a certain sum on simple interest and the same sum on compound interest at a certain rate of interest per annum. He noticed that the ratio between the difference of compound interest and simple interest of 3 years and that of 2 years is 25:8. The rate of interest per annum is (a) 10% (b) 11% (c) 12% (d) 12 1/2%

At 8% simple interest per annum a sum of money becomes ₹300 in 2 1/2 years. What was the sum invested?

A lent Rs 5000 to B for 2 years and Rs 3000 to C for 4 years on simple interest at the same rate of interest and received Rs 2200 in all from both of them as interest. The rate of interest per annum is (a) 5% (b) 7% (c) 7 1/8% (d) 10%

The interest earned on Rs15000 in 3 years at simple interest is Rs 5400. Find the rate of interest per annum (a) 11.5% (b) 12% (c) 12.5% (d) 15%

A sum of money invested at simple interest becomes 13/10 of itself in 2 years and 6 months. What is the rate (in percentage) of interest per annum?

In what time does a sum of money becomes 4 times of itself at simple interest rate of 15% per annum .