Nitin borrowed some money at the rate of 6% p.a. for the first three years, 9 % p. a. for the next five years and 13 % p.a. for the period beyond eight years. If the total interest paid by him at the end of eleven years is ₹8,160, the money borrowed by him ( in ₹ ) was -  

A certain sum of money lent out at simple interest amounts to Rs. 2400 in 4 years and Rs. 3000 in 6 years. Find the rate of interest per annum?

The simple interest accrued on an amount of Rs. 8500 at the end of four years is Rs.3400. What would be the compound interest accrued on the same amount at the same rate of interest after three years?

A certain sum becomes Rs. 1020 in 5 years and Rs. 1200 in 8 years at simple interest. What is the value of principal? 

A person borrows some money for 5 years and the ratio of the loan amount: total interest amount is 5 : 2. Then find the ratio of the loan amount: interest rate is equal to 

Mohit borrowed Rs. 22000 at 5% simple interest repayable in 5 equal installments. What will be the annual installment payable by him?

Simple interest on a certain sum is equal to the sum itself. find the time if rate of interest and time are numerically equal.