The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 80 g |
75¢ |
85¢ |
Every additional 10 g |
30¢ |
35¢ |
Carl paid $4.55 for posting a package locally. What was the greatest possible mass of the package that Carl posted?
$1 = 100¢
$4.55 = 4.55 x 100 = 455¢
Amount that Carl paid for the additional sets of 10 g for the local package
= 455 - 75
= 380¢
Number of sets of 10 g that Carl paid for the local package
= 380 ÷ 10
= 38
Mass of 38 sets of 10 g for the local package
= 38 x 10
= 380 g
Greatest possible mass of the local package
= 80 + 380
= 460 g
Answer(s): 460 g