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 4 days |
20 cents a day |
After 4 days |
50 cents a day |
Simon rented 4 books and was charged $7.20. How many days did he rent the books for?
$1 = 100¢
$7.20 = 7.20 x 100 = 720¢
Amount that Simon paid for each book
= 720 ÷ 4
= 180¢
Amount that Simon paid for each book for renting for the first 4 days
= 4 x 20
= 80¢
Additional amount that Simon paid for each book for renting for additional days
= 180 - 80
= 100¢
Number of additional days that Simon rented for each book
= 100 ÷ 50
= 2
Total number of days that Simon rented the books
= 4 + 2
= 6
Answer(s): 6