The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 60 g |
40¢ |
45¢ |
Every additional 10 g |
15¢ |
20¢ |
Eric paid $4.55 for posting a package overseas. What was the greatest possible mass of the package that Eric posted?
$1 = 100¢
$4.55 = 4.55 x 100 = 455¢
Amount that Eric paid for the additional sets of 10 g for the overseas package
= 455 - 45
= 410¢
Number of sets of 10 g that Eric paid for the overseas package
= 410 ÷ 10
= 41
Mass of 41 sets of 10 g for the overseas package
= 41 x 10
= 410 g
Greatest possible mass of the overseas package
= 60 + 410
= 470 g
Answer(s): 470 g