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 2 days |
60 cents a day |
After 2 days |
90 cents a day |
Charlie rented 4 books and was charged $33.60. How many days did he rent the books for?
$1 = 100¢
$33.60 = 33.60 x 100 = 3360¢
Amount that Charlie paid for each book
= 3360 ÷ 4
= 840¢
Amount that Charlie paid for each book for renting for the first 2 days
= 2 x 60
= 120¢
Additional amount that Charlie paid for each book for renting for additional days
= 840 - 120
= 720¢
Number of additional days that Charlie rented for each book
= 720 ÷ 90
= 8
Total number of days that Charlie rented the books
= 2 + 8
= 10
Answer(s): 10