simple
interest
gained
An amount of R800 is invested for three years. Interest is calculated
using simple interest at a rate of r% per annum. The investment yields
R168. Calculate the value of r.
Bongani is a car salesperson. He earns a commission of 3% on the
sale of a car with the value of R220 000. Calculate how much
commission he earned
cost
deposit
balance = cost - deposit
Deposit = 33100/100 x 10 = 3310
Balance =
33100 - 3310 = 29790
interest amount = 29790 x 11 x 3 /100 = 9830,70
paying in total =
9830,70
29970+9830+3310 = 42930