Find the principal when :
simple interest at 16 % per annum for `2 1/2 ` years is Rs 3840 .

Find the principal when : simple interest at 7 1/2 % per annum for 2 years 4 months is Rs 2730 .

Find the principal when : final amount is Rs 2420 at 4 % per annum for 2 1/2 years.

Find the time when : simple interest on Rs 2500 at 4 % per annum is Rs 200

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

Find the time when : simple interest on Rs 2500 at 4 % annum is Rs 200 .

Find the compound interest on Rs 24000 at 15% per annum for 2 1/3 years.

The difference between the compound interest and simple interest on a certain sum at 15% per annum for 3 years is Rs 283.50. Find the sum.

Find the time when : Rs 1250 amounts to Rs 1950 at 16 % per annum

Find the interest on rs 1600 at 6 % per annum for 146 days .

Find the time when : simple interest on Rs 1.20 lakhs at 6 1/2 per annum is Rs 27300 .