SIMPLE INTEREST AND SIMPLE DISCOUNT TUTORIAL SOLUTIONS
1.1 Calculate the amount of simple interest if R800 is invested for 7 months and interest
is calculated at 10.75% per annum.
Ans: R50,17
1.2 Calculate the amount of simple interest if R1 200 is invested for 5 months and
interest is calculated at 11% per annum.
Ans: R55.00
1.3 Calculate the amount of simple interest if R650 is invested for 15 months and
interest is calculated at 8% per annum.
Ans: R65.00
1.4 Calculate the amount of simple interest if R960 is invested for 23 months and
interest is calculated at 7% per annum.
Ans: R128,80
1.5 What is the investment period if R1 600 is the principal, R2 200 the final amount and
the interest rate is 9.5% per annum?
Ans: 3,95 years
1.6 Calculate the time it will take for a capital investment to double if the interest rate is
6% per annum?
Ans: 12 years
1.7 Calculate the time it would take for a capital investment of R1 500 to earn R 350
interest if the interest rate is 9.5% per annum.
Ans: 2,46 years
1.8 Calculate the annual rate of simple interest that is earned if a capital investment of
R1 750 increases to R1 881.25 over a 12 month period.
Ans: 7.5%
1.9 Calculate the annual rate of simple interest that is earned if a capital investment of
R1 400 increases to R1 505 over a 15 month period.
Ans: 6.0%