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 2 days |
30 cents a day |
After 2 days |
50 cents a day |
Xavier 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 Xavier paid for each book
= 2050 ÷ 5
= 410¢
Amount that Xavier paid for each book for renting for the first 2 days
= 2 x 30
= 60¢
Additional amount that Xavier paid for each book for renting for additional days
= 410 - 60
= 350¢
Number of additional days that Xavier rented for each book
= 350 ÷ 50
= 7
Total number of days that Xavier rented the books
= 2 + 7
= 9
Answer(s): 9