The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 80 g |
40¢ |
75¢ |
Every additional 10 g |
15¢ |
35¢ |
Oliver paid $2.75 for posting a package overseas. What was the greatest possible mass of the package that Oliver posted?
$1 = 100¢
$2.75 = 2.75 x 100 = 275¢
Amount that Oliver paid for the additional sets of 10 g for the overseas package
= 275 - 75
= 200¢
Number of sets of 10 g that Oliver paid for the overseas package
= 200 ÷ 10
= 20
Mass of 20 sets of 10 g for the overseas package
= 20 x 10
= 200 g
Greatest possible mass of the overseas package
= 80 + 200
= 280 g
Answer(s): 280 g