At a rate of simple interest `7(1)/(2)%` per annum, find the total amount of a principal of `Rs600` in `219` days.

At the rate of compound interest 5% per annum, find the amount of Rs. 80000 in 2 1/2 years.

A person borrowed Rs 10000 from four men. If he had to repay the first man for his Rs 2000 at the rate of simple interest of 8% per annum, the second man for his Rs 4000 at the rate of simple interest of 7(1)/(2)% per annum and the third man for his Rs 1400 at a rate of simple interest of 8(1)/(2)% per annum, then in what rate of simple interest in percent per annum, the fourth man should be paid for his rest part of principal so as to the average rate of simple interest be 8.13% per annum?

If the rate of simple interest is 12% per annum, the amount the would fetch interest of Rs. 6000 per annum is :

What is the rate of simple interest in percent per annum if the total interest of Rs 73,000 for 1 day is 50 paisa?

If the rate of interest is 10% per annum and is compounded half yearly, the principal of Rs. 400 in 3/2 years will amount to

A certain principal amounts Rs2750 in 2 years at a rate of simple interest of 5% per annum. Then find the rate of simple interest in percent per annum for which the principal amounts Rs3000 in 2 years.

At the same rate of simple interest in percent per annum, if a principal becomes are amount of Rs 7100 in 7 yrs and of Rs 6200 in 4 yrs, then find the principal and rate of simple interest in percent per annum.

The simple interest of a principal in 1 year and 9 months at the rate of simple interest of 5% per annum is 63Rs more than of the same principal in 2 years and 4 months at the rate of simple interest of 4(1)/(2)% per annum. Find the principal.

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 rate of simple interest in percent per annum if the simple interest of a principal is 3/5 part of the amount in 10 years.