The simple interest on Rs. 12000 at a certain rate of interest in five years is Rs. 7200. Find the compound interest on the same amount for five years at the same rate of interest.

A sum of money placed at compound interest triples itself in 9 year. In how many years will if amount to 243 times itself?

The compound interest on Rs.30,000 at 7% per annum is Rs. 4347. The period (in years) is:

What is a difference between simple interest and compound interest in 1 year at a rate of 10 percent on an amount of Rs. 1200. If interest is half yearly compounded?

A bank offers a 20% compound interest per half year . A customer deposits Rs. 2800 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is______

If a sum of money becomes 8 times in 9 years at compound interest annually, in how much time it will become 32 times?

There is 80% increase in amount in 5 years at simple interest. What will be the compound interest of Rs. 20,000 after 3 years at the same rate?

Rahul plans to buy a scooter for his sister for which he saves Rs. 15625 at the start of every year for 3 year. If the rate of CI is 4% pa. then amount at which he plans to buy the scooter is (in Rs.)