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 |
20 cents a day |
After 2 days |
60 cents a day |
Mark rented 4 books and was charged $13.60. How many days did he rent the books for?
$1 = 100¢
$13.60 = 13.60 x 100 = 1360¢
Amount that Mark paid for each book
= 1360 ÷ 4
= 340¢
Amount that Mark paid for each book for renting for the first 2 days
= 2 x 20
= 40¢
Additional amount that Mark paid for each book for renting for additional days
= 340 - 40
= 300¢
Number of additional days that Mark rented for each book
= 300 ÷ 60
= 5
Total number of days that Mark rented the books
= 2 + 5
= 7
Answer(s): 7