A certain sum of Rs.4200 becomes Rs5523 at 11% p.a simple interest in a certain time. What is the simple interest on the sum of Rs. 4800 at the same rate and in same time period?

Any money at the rate of simple interest becomes Rs 1143 in 3 years and Rs 1305 in 5 years Find the rate of principal and interest.

A man invested Rs.25000 on simple interest at R% p.a. If interest received by man is three twentieth of the principal after three years, then find ‘R’?

If the simple interest on a certain sum of money for 2 years in one fifth of the Principal, then find rate of interest per annum. 

A principal increase by 50 percent in five years at the rate of simple interest. What will be the compound interest for 3 years at Rs 20,000 with the same interest rate?

At what annual percentage rate, 10 years of simple interest on an amount will be $$ {2\over 5}$$ of the addition?

If the simple interest on ₹ 1 for 1 month is 1 paisa, then the rate percent per annum will be 

The difference between simple interest and compound on Rs. 1200 for one year at 10% per annum reckoned half-yearly is: