A sum of money amounts to 5,200 in 5 years and to 5,680 in 7 years at simple interest. The rate of interest per annum is-

The simple interest accrued on an amount of Rs 16500 at the end of 3 years is Rs. 4950. What would be the compound interest accrued on the same amount at the same rate in the same period? 

Two equal sum were lent out at 7% and 5% S.I respectively. The interest earned on the two loans add up to ₹960 for 4 years. The total sum lent out is 

Megha invests an amount of Rs. 15,860 in the names of her three daughters A, B and C in such a way that they get the same interest after 2, 3 and 4 years respectively. If the rate of simple interest is 5 % p.a, then the ratio of the amounts invested among A, B and C will be – 

What is the simple interest when Rs. 13000 get the interest Rs. 6,370 in the $$ {3{1\over 2}}$$ year?

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 on a sum of money is 4 / 9 of the principal and the number of years is equal to the rate percent per annum. The rate per annum is