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 |
30 cents a day |
After 3 days |
40 cents a day |
Lee rented 5 books and was charged $20.50. How many days did he rent the books for?
$1 = 100¢
$20.50 = 20.50 x 100 = 2050¢
Amount that Lee paid for each book
= 2050 ÷ 5
= 410¢
Amount that Lee paid for each book for renting for the first 3 days
= 3 x 30
= 90¢
Additional amount that Lee paid for each book for renting for additional days
= 410 - 90
= 320¢
Number of additional days that Lee rented for each book
= 320 ÷ 40
= 8
Total number of days that Lee rented the books
= 3 + 8
= 11
Answer(s): 11