The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
40¢ |
95¢ |
Every additional 10 g |
15¢ |
45¢ |
Owen paid $5.30 for posting a package locally. What was the greatest possible mass of the package that Owen posted?
$1 = 100¢
$5.30 = 5.30 x 100 = 530¢
Amount that Owen paid for the additional sets of 10 g for the local package
= 530 - 40
= 490¢
Number of sets of 10 g that Owen paid for the local package
= 490 ÷ 10
= 49
Mass of 49 sets of 10 g for the local package
= 49 x 10
= 490 g
Greatest possible mass of the local package
= 70 + 490
= 560 g
Answer(s): 560 g