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 8 days |
20 cents a day |
After 8 days |
30 cents a day |
Luis rented 4 books and was charged $13.60. How many days did he rent the books for?
$1 = 100¢
$13.60 = 13.60 x 100 = 1360¢
Amount that Luis paid for each book
= 1360 ÷ 4
= 340¢
Amount that Luis paid for each book for renting for the first 8 days
= 8 x 20
= 160¢
Additional amount that Luis paid for each book for renting for additional days
= 340 - 160
= 180¢
Number of additional days that Luis rented for each book
= 180 ÷ 30
= 6
Total number of days that Luis rented the books
= 8 + 6
= 14
Answer(s): 14