The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 90 g |
65¢ |
75¢ |
Every additional 10 g |
25¢ |
35¢ |
Charlie paid $4.65 for posting a package locally. What was the greatest possible mass of the package that Charlie posted?
$1 = 100¢
$4.65 = 4.65 x 100 = 465¢
Amount that Charlie paid for the additional sets of 10 g for the local package
= 465 - 65
= 400¢
Number of sets of 10 g that Charlie paid for the local package
= 400 ÷ 10
= 40
Mass of 40 sets of 10 g for the local package
= 40 x 10
= 400 g
Greatest possible mass of the local package
= 90 + 400
= 490 g
Answer(s): 490 g