Find the principal of which the monthly interest is `1Rs` at the rate of `5%` annual simple interest.

Find the compound interest at the rate of 5% for three years on that principal which in three years at the rate of 5% per annum given Rs 12000 as simple interest.

Find the compound interest at the rate of 5% for three years on that principal which in three years at the rate of 5% per annum given Rs 12000 as simple interest.

Find the compound interest at the rate of 5% per annum for 3 years on that principal which in 3 years at the rate of 5% per annum given Rs 1200 as simple interest.

Find the compound interest at the rate of 5% per annum for 3 years on that principal which in 3 years at the rate of 5% per annum given Rs 1200 as simple interest.

What is the principal amount on which the difference between the compound interest and simple interest is Rs.40 ,after two years at the rate of annual interest 5%?

The total interest at the rate of simple interest of 5% per annum of Rs300 and at the rate of simple interest of 3% per annum of Rs500 for 2 years more period of time, is together Rs150 . Find the period of time for which the interest of two principals have been claculated.

Find the difference in amount and principal for X 4000 at the rate of 5% annual interest in 4 yr.