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 8 days |
60 cents a day |
After 8 days |
70 cents a day |
Japheth rented 3 books and was charged $29.10. How many days did he rent the books for?
$1 = 100¢
$29.10 = 29.10 x 100 = 2910¢
Amount that Japheth paid for each book
= 2910 ÷ 3
= 970¢
Amount that Japheth paid for each book for renting for the first 8 days
= 8 x 60
= 480¢
Additional amount that Japheth paid for each book for renting for additional days
= 970 - 480
= 490¢
Number of additional days that Japheth rented for each book
= 490 ÷ 70
= 7
Total number of days that Japheth rented the books
= 8 + 7
= 15
Answer(s): 15