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 |
40 cents a day |
Warren rented 2 books and was charged $2.40. How many days did he rent the books for?
$1 = 100¢
$2.40 = 2.40 x 100 = 240¢
Amount that Warren paid for each book
= 240 ÷ 2
= 120¢
Amount that Warren paid for each book for renting for the first 2 days
= 2 x 20
= 40¢
Additional amount that Warren paid for each book for renting for additional days
= 120 - 40
= 80¢
Number of additional days that Warren rented for each book
= 80 ÷ 40
= 2
Total number of days that Warren rented the books
= 2 + 2
= 4
Answer(s): 4