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 |
50 cents a day |
After 2 days |
80 cents a day |
Mark rented 2 books and was charged $5.20. How many days did he rent the books for?
$1 = 100¢
$5.20 = 5.20 x 100 = 520¢
Amount that Mark paid for each book
= 520 ÷ 2
= 260¢
Amount that Mark paid for each book for renting for the first 2 days
= 2 x 50
= 100¢
Additional amount that Mark paid for each book for renting for additional days
= 260 - 100
= 160¢
Number of additional days that Mark rented for each book
= 160 ÷ 80
= 2
Total number of days that Mark rented the books
= 2 + 2
= 4
Answer(s): 4