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 6 days |
40 cents a day |
After 6 days |
90 cents a day |
Brandon rented 3 books and was charged $23.40. How many days did he rent the books for?
$1 = 100¢
$23.40 = 23.40 x 100 = 2340¢
Amount that Brandon paid for each book
= 2340 ÷ 3
= 780¢
Amount that Brandon paid for each book for renting for the first 6 days
= 6 x 40
= 240¢
Additional amount that Brandon paid for each book for renting for additional days
= 780 - 240
= 540¢
Number of additional days that Brandon rented for each book
= 540 ÷ 90
= 6
Total number of days that Brandon rented the books
= 6 + 6
= 12
Answer(s): 12