A sum of money triples itself in 10 years at simple interest. What is the rate of interest per annum?

What is the simple interest earned on TK. 1500 in 4 years at an interest rate of 5% per annum?

A sum of TK. 2000 is invested for 2 years at a simple interest rate of 9%. What is the total amount after the investment period?

If TK. 1000 earns TK. 200 as simple interest in 4 years, what is the rate of interest per annum?

How much interest is earned on TK. 2000 in 3 years at a rate of 5% per annum?

Find the time n for TK. 1000 to become TK. 1300 at a rate of 5%.

A sum of money doubles itself in 20 years. What is the rate of interest?

A sum of money grows to TK. 4200 in 5 years at a simple interest rate of 8%. What is the principal amount?

A man wishes to invest TK. 1200. He can invest in a math club, which pays simple interest of 8% for 3 years. What is the amount in his account after 3 years?

A sum of money at simple interest amounts to 815 in 3 years and to 854 in 4 years. The sum is: