A book rental shop rented out books and the rate of rental charges are shown in the table.
Number of days |
Rates |
After the first 3 days |
50 cents a day |
After 3 days |
80 cents a day |
Simon rented 5 books and was charged $43.50. How many days did he rent the books for?
$1 = 100¢
$43.50 = 43.50 x 100 = 4350¢
Amount that Simon paid for each book
= 4350 ÷ 5
= 870¢
Amount that Simon paid for each book for renting for the first 3 days
= 3 x 50
= 150¢
Additional amount that Simon paid for each book for renting for additional days
= 870 - 150
= 720¢
Number of additional days that Simon rented for each book
= 720 ÷ 80
= 9
Total number of days that Simon rented the books
= 3 + 9
= 12
Answer(s): 12