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 3 days |
50 cents a day |
After 3 days |
90 cents a day |
Luke rented 4 books and was charged $34.80. How many days did he rent the books for?
$1 = 100¢
$34.80 = 34.80 x 100 = 3480¢
Amount that Luke paid for each book
= 3480 ÷ 4
= 870¢
Amount that Luke paid for each book for renting for the first 3 days
= 3 x 50
= 150¢
Additional amount that Luke paid for each book for renting for additional days
= 870 - 150
= 720¢
Number of additional days that Luke rented for each book
= 720 ÷ 90
= 8
Total number of days that Luke rented the books
= 3 + 8
= 11
Answer(s): 11