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 |
40 cents a day |
After 3 days |
90 cents a day |
Rael rented 5 books and was charged $28.50. How many days did he rent the books for?
$1 = 100¢
$28.50 = 28.50 x 100 = 2850¢
Amount that Rael paid for each book
= 2850 ÷ 5
= 570¢
Amount that Rael paid for each book for renting for the first 3 days
= 3 x 40
= 120¢
Additional amount that Rael paid for each book for renting for additional days
= 570 - 120
= 450¢
Number of additional days that Rael rented for each book
= 450 ÷ 90
= 5
Total number of days that Rael rented the books
= 3 + 5
= 8
Answer(s): 8