The interest ($/) received from an investment varies jointly as the interest rate per annum (%) and the period of investment (T years). If a sum of money is invested for 2 years at an interest rate of 8% p.a., the interest received will be $800. (a) Express I in terms of r and T. (b) If the same sum of money is invested for 3 years at an interest rate of 14% p.a., find the interest received.

A man earned interest of Rs. 1,050 on investing a certain sum at compound interest of 10% p.a., compounded annually for 2 years. Find the interest earned by him when the same sum is invested at simple interest of 8% p.a. for 3 years. a. RS 1100 b. RS 1200 c. RS 1020 d. RS 1000

1. 500 was invested at 12% per annum simple interest and a certain sum of money invested at 10% per annum simple interest. If the sum of the interest on both the sum after 4 years is 480, the latter sum of money is ?450 750 600 550

Raj had a total of 24000 rupees. He invested one-third of his share at the rate of 12 percent per annum simple interest for 2 years. He invested 20 percent of the remaining amount at the rate of 10 percent per annum compound interest for 3 years and deposited the remaining amount at 15 percent per annum in a fixed deposit (compound interest) of a bank for 2 years. Find the total interest received by him.Question 23Answera.Rs. 7021.6b.Rs. 7107.2c.Rs. 7607.2d.Rs. 7461.6

If the difference between the simple interest on a certain sum of money for 4 years at 2.5% per an-num and the simple interest on the same sum for the same period at 3% per annum is Rs. 60, then find the sum.

On a certain sum of money. Compound interest earned after 2 years is Rs.5805 and simple interest earned after 3 years is Rs.8100. Find the principal amount, if the rate of interest is same.