Simple Interest Questions

A person borrows some money for 8 years at a rate of simple interest. If the ratio of principal and total interest is 5 : 8, then what is the rate ( inpercentage) of interest?

There is 40% increase in an amount in 10 years at simple interest. What will be the compound interest of Rs 25000 after 2 years at the same rate?

Deksha borrowed Rs. 500 at 5% per annum S.I. What amount (in Rs.) will she pay to clear her debt after 4 years?

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 9% per annum is Rs 405. The sum is ______ .

If the time increases by 5 years, then simple interest increases by Rs 3000 on a sum of Rs 5000. What is the rate (in percentage) of interest per annum?

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

A certain principal is invested in a scheme of compound interest. The amount obtained after 1 year is Rs 2400 and the amount obtained after 2 years is Rs 2880. What is the rate of interest (in percentage)?

If a sum of money doubles itself in 8 yrs, then the interest rate in percentage is ?