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 6 days |
20 cents a day |
After 6 days |
50 cents a day |
Glen rented 4 books and was charged $18.80. How many days did he rent the books for?
$1 = 100¢
$18.80 = 18.80 x 100 = 1880¢
Amount that Glen paid for each book
= 1880 ÷ 4
= 470¢
Amount that Glen paid for each book for renting for the first 6 days
= 6 x 20
= 120¢
Additional amount that Glen paid for each book for renting for additional days
= 470 - 120
= 350¢
Number of additional days that Glen rented for each book
= 350 ÷ 50
= 7
Total number of days that Glen rented the books
= 6 + 7
= 13
Answer(s): 13