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 2 days |
40 cents a day |
After 2 days |
70 cents a day |
Sam rented 2 books and was charged $5.80. How many days did he rent the books for?
$1 = 100¢
$5.80 = 5.80 x 100 = 580¢
Amount that Sam paid for each book
= 580 ÷ 2
= 290¢
Amount that Sam paid for each book for renting for the first 2 days
= 2 x 40
= 80¢
Additional amount that Sam paid for each book for renting for additional days
= 290 - 80
= 210¢
Number of additional days that Sam rented for each book
= 210 ÷ 70
= 3
Total number of days that Sam rented the books
= 2 + 3
= 5
Answer(s): 5