find the rate of interest when simple interest on rupees 1560 in 3 years is rupees 585

Find the rate of interest when : simple interest on Rs 1625 in 2 1/2 years is Rs 325 .

Without using formula , find the difference between the compound interest and the simple interest on rupes 16,000 at 9% per annum in 2 years.

The difference between the compound interest (compounded annually) and simple interest, for two years on the same sum at the amount rate of interest is Rs 370. Find the rate of interest if the simple interest on the amount at the same rate of interest for 1 year is Rs 3700.

If the difference of the compound interest and the simple interest on a sum of money for 3 years is Rs. 78. Find the sum of money, if the rate of interest in both case be 10%