The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 60 g |
45¢ |
95¢ |
Every additional 10 g |
15¢ |
40¢ |
Paul paid $4.15 for posting a package overseas. What was the greatest possible mass of the package that Paul posted?
$1 = 100¢
$4.15 = 4.15 x 100 = 415¢
Amount that Paul paid for the additional sets of 10 g for the overseas package
= 415 - 95
= 320¢
Number of sets of 10 g that Paul paid for the overseas package
= 320 ÷ 10
= 32
Mass of 32 sets of 10 g for the overseas package
= 32 x 10
= 320 g
Greatest possible mass of the overseas package
= 60 + 320
= 380 g
Answer(s): 380 g