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 5 days |
30 cents a day |
After 5 days |
80 cents a day |
Harry rented 4 books and was charged $25.20. How many days did he rent the books for?
$1 = 100¢
$25.20 = 25.20 x 100 = 2520¢
Amount that Harry paid for each book
= 2520 ÷ 4
= 630¢
Amount that Harry paid for each book for renting for the first 5 days
= 5 x 30
= 150¢
Additional amount that Harry paid for each book for renting for additional days
= 630 - 150
= 480¢
Number of additional days that Harry rented for each book
= 480 ÷ 80
= 6
Total number of days that Harry rented the books
= 5 + 6
= 11
Answer(s): 11