How many times will the sum gets multiplied in 10 years at 20 percent per annum simple rate of interest?

To calculate the total amount after 10 years at a simple interest rate of 20% per annum, you need to consider that the interest is added to the principal each year. The sum will be multiplied by 1.2 (100% + 20%) each year for 10 years. Therefore, the sum will be multiplied 10 times over the course of 10 years.