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 |
50 cents a day |
After 6 days |
80 cents a day |
Will rented 2 books and was charged $15.60. How many days did he rent the books for?
$1 = 100¢
$15.60 = 15.60 x 100 = 1560¢
Amount that Will paid for each book
= 1560 ÷ 2
= 780¢
Amount that Will paid for each book for renting for the first 6 days
= 6 x 50
= 300¢
Additional amount that Will paid for each book for renting for additional days
= 780 - 300
= 480¢
Number of additional days that Will rented for each book
= 480 ÷ 80
= 6
Total number of days that Will rented the books
= 6 + 6
= 12
Answer(s): 12