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 3 days |
20 cents a day |
After 3 days |
70 cents a day |
Neave rented 4 books and was charged $27.60. How many days did he rent the books for?
$1 = 100¢
$27.60 = 27.60 x 100 = 2760¢
Amount that Neave paid for each book
= 2760 ÷ 4
= 690¢
Amount that Neave paid for each book for renting for the first 3 days
= 3 x 20
= 60¢
Additional amount that Neave paid for each book for renting for additional days
= 690 - 60
= 630¢
Number of additional days that Neave rented for each book
= 630 ÷ 70
= 9
Total number of days that Neave rented the books
= 3 + 9
= 12
Answer(s): 12