The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 60 g |
45¢ |
55¢ |
Every additional 10 g |
15¢ |
20¢ |
Elijah paid $4.25 for posting a package overseas. What was the greatest possible mass of the package that Elijah posted?
$1 = 100¢
$4.25 = 4.25 x 100 = 425¢
Amount that Elijah paid for the additional sets of 10 g for the overseas package
= 425 - 55
= 370¢
Number of sets of 10 g that Elijah paid for the overseas package
= 370 ÷ 10
= 37
Mass of 37 sets of 10 g for the overseas package
= 37 x 10
= 370 g
Greatest possible mass of the overseas package
= 60 + 370
= 430 g
Answer(s): 430 g