The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 50 g |
40¢ |
80¢ |
Every additional 10 g |
15¢ |
35¢ |
Jack paid $3.60 for posting a package locally. What was the greatest possible mass of the package that Jack posted?
$1 = 100¢
$3.60 = 3.60 x 100 = 360¢
Amount that Jack paid for the additional sets of 10 g for the local package
= 360 - 40
= 320¢
Number of sets of 10 g that Jack paid for the local package
= 320 ÷ 10
= 32
Mass of 32 sets of 10 g for the local package
= 32 x 10
= 320 g
Greatest possible mass of the local package
= 50 + 320
= 370 g
Answer(s): 370 g