The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 60 g |
40¢ |
50¢ |
Every additional 10 g |
15¢ |
20¢ |
Glen paid $4.10 for posting a package overseas. What was the greatest possible mass of the package that Glen posted?
$1 = 100¢
$4.10 = 4.10 x 100 = 410¢
Amount that Glen paid for the additional sets of 10 g for the overseas package
= 410 - 50
= 360¢
Number of sets of 10 g that Glen paid for the overseas package
= 360 ÷ 10
= 36
Mass of 36 sets of 10 g for the overseas package
= 36 x 10
= 360 g
Greatest possible mass of the overseas package
= 60 + 360
= 420 g
Answer(s): 420 g