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 5 days |
40 cents a day |
After 5 days |
60 cents a day |
Warren rented 4 books and was charged $17.60. How many days did he rent the books for?
$1 = 100¢
$17.60 = 17.60 x 100 = 1760¢
Amount that Warren paid for each book
= 1760 ÷ 4
= 440¢
Amount that Warren paid for each book for renting for the first 5 days
= 5 x 40
= 200¢
Additional amount that Warren paid for each book for renting for additional days
= 440 - 200
= 240¢
Number of additional days that Warren rented for each book
= 240 ÷ 60
= 4
Total number of days that Warren rented the books
= 5 + 4
= 9
Answer(s): 9