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 |
30 cents a day |
After 6 days |
40 cents a day |
Caden rented 3 books and was charged $12.60. How many days did he rent the books for?
$1 = 100¢
$12.60 = 12.60 x 100 = 1260¢
Amount that Caden paid for each book
= 1260 ÷ 3
= 420¢
Amount that Caden paid for each book for renting for the first 6 days
= 6 x 30
= 180¢
Additional amount that Caden paid for each book for renting for additional days
= 420 - 180
= 240¢
Number of additional days that Caden rented for each book
= 240 ÷ 40
= 6
Total number of days that Caden rented the books
= 6 + 6
= 12
Answer(s): 12