The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 80 g |
45¢ |
95¢ |
Every additional 10 g |
20¢ |
40¢ |
Ben paid $4.55 for posting a package locally. What was the greatest possible mass of the package that Ben posted?
$1 = 100¢
$4.55 = 4.55 x 100 = 455¢
Amount that Ben paid for the additional sets of 10 g for the local package
= 455 - 45
= 410¢
Number of sets of 10 g that Ben paid for the local package
= 410 ÷ 10
= 41
Mass of 41 sets of 10 g for the local package
= 41 x 10
= 410 g
Greatest possible mass of the local package
= 80 + 410
= 490 g
Answer(s): 490 g