A sum of TK. 12,500 amounts to TK. 15,500 in 4 years at the rate of simple interest. What is the rate of interest?

Tom paid TK. 9600 as interest on a loan he took 5 years ago at a 16% rate of simple interest. What was the amount he took as a loan?

If a principal amount of TK. 4000 earns TK. 1600 as interest in 5 years, what is the rate of interest per annum?

Paul invests TK. 3000 for one year at a rate of 6%. How much interest will he earn at the end of that year?

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

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

An amount of TK. 4500 is invested at a simple interest rate of 12% per annum. If the interest earned is TK. 2160, how many years was the money invested?

If the amount of TK. 5000 becomes TK. 6000 in 4 years at simple interest, what is the amount of simple interest?

How much simple interest will be earned on TK. 6000 in 2 years at an interest rate of 8% per annum?

A sum of TK. 2500 grows to TK. 3250 in 5 years at simple interest. What is the rate of interest?