A person lends 40 % of his sum of money at 15 % per annum, 50 % of rest at 10 % per annum and the rest at 18 % per annum rate of interest. What would be the annual rate of interest, if the interest is calculated on the whole sum? 

A man borrows some amount at the rate of 12% per annum at simple interest. After 6 years 8 months, he paid 720 as an interest. Find the amount borrowed by him. 

Ramesh deposited ₹ 15600 in a fixed deposit at the rate of 10 % per annum simple interest. After every second year, he adds his interest earnings to the principal. The interest at the end of fourth year is 

What sum will give Rs. 488 as the difference between simple interest and compound interest at 10% in years compounded half yearly ?

A sum of money becomes 4 times at simple interest in 10 years. What is the rate of interest?

₹ 500 was invested at 12 % per annum simple interest and another certain sum of money invested at 10 % per annum simple interest . If the total interest on both the sum after 4 years is 480, the latter sum of money is

What is the difference between the interest of Ram and Shyam in the given picture if Ram's money is on simple interest and Shyam's money is on compound interest.

If the instalments are paid at the end of every year, what annual payment will discharge a debt of Rs. 7,200 due in 3 years at 20% per annum simple interest?