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 7 days |
50 cents a day |
After 7 days |
80 cents a day |
Neave rented 3 books and was charged $17.70. How many days did he rent the books for?
$1 = 100¢
$17.70 = 17.70 x 100 = 1770¢
Amount that Neave paid for each book
= 1770 ÷ 3
= 590¢
Amount that Neave paid for each book for renting for the first 7 days
= 7 x 50
= 350¢
Additional amount that Neave paid for each book for renting for additional days
= 590 - 350
= 240¢
Number of additional days that Neave rented for each book
= 240 ÷ 80
= 3
Total number of days that Neave rented the books
= 7 + 3
= 10
Answer(s): 10