The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 80 g |
70¢ |
85¢ |
Every additional 10 g |
30¢ |
40¢ |
Owen paid $5.20 for posting a package locally. What was the greatest possible mass of the package that Owen posted?
$1 = 100¢
$5.20 = 5.20 x 100 = 520¢
Amount that Owen paid for the additional sets of 10 g for the local package
= 520 - 70
= 450¢
Number of sets of 10 g that Owen paid for the local package
= 450 ÷ 10
= 45
Mass of 45 sets of 10 g for the local package
= 45 x 10
= 450 g
Greatest possible mass of the local package
= 80 + 450
= 530 g
Answer(s): 530 g