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 |
Ryan rented 3 books and was charged $11.40. How many days did he rent the books for?
$1 = 100¢
$11.40 = 11.40 x 100 = 1140¢
Amount that Ryan paid for each book
= 1140 ÷ 3
= 380¢
Amount that Ryan paid for each book for renting for the first 6 days
= 6 x 30
= 180¢
Additional amount that Ryan paid for each book for renting for additional days
= 380 - 180
= 200¢
Number of additional days that Ryan rented for each book
= 200 ÷ 40
= 5
Total number of days that Ryan rented the books
= 6 + 5
= 11
Answer(s): 11