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 7 days |
40 cents a day |
After 7 days |
90 cents a day |
Tim rented 5 books and was charged $36.50. How many days did he rent the books for?
$1 = 100¢
$36.50 = 36.50 x 100 = 3650¢
Amount that Tim paid for each book
= 3650 ÷ 5
= 730¢
Amount that Tim paid for each book for renting for the first 7 days
= 7 x 40
= 280¢
Additional amount that Tim paid for each book for renting for additional days
= 730 - 280
= 450¢
Number of additional days that Tim rented for each book
= 450 ÷ 90
= 5
Total number of days that Tim rented the books
= 7 + 5
= 12
Answer(s): 12