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 

A takes a loan of Rs. 1500 from a bank at the rate of 10% simple interest for 3 years and lends to B at the rate of 15% for the same time period. Find the overall profit of A in the whole transaction.

A sum of ₹ 3000 yields an interest of ₹ 1080 at 12% per annum simple interest in how many years ?

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

If the difference between CI and SI for 3 years at the rate of 10% is Rs 31. Find the principle.

The simple interest on an amount at the rate of 13.5 p.c.p.a. for 10 years is Rs. 765.45. What is the sum?