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 |
60 cents a day |
After 8 days |
70 cents a day |
Billy rented 5 books and was charged $41.50. How many days did he rent the books for?
$1 = 100¢
$41.50 = 41.50 x 100 = 4150¢
Amount that Billy paid for each book
= 4150 ÷ 5
= 830¢
Amount that Billy paid for each book for renting for the first 8 days
= 8 x 60
= 480¢
Additional amount that Billy paid for each book for renting for additional days
= 830 - 480
= 350¢
Number of additional days that Billy rented for each book
= 350 ÷ 70
= 5
Total number of days that Billy rented the books
= 8 + 5
= 13
Answer(s): 13