The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 60 g |
40¢ |
45¢ |
Every additional 10 g |
15¢ |
20¢ |
Wesley paid $5.10 for posting a package locally. What was the greatest possible mass of the package that Wesley posted?
$1 = 100¢
$5.10 = 5.10 x 100 = 510¢
Amount that Wesley paid for the additional sets of 10 g for the local package
= 510 - 40
= 470¢
Number of sets of 10 g that Wesley paid for the local package
= 470 ÷ 10
= 47
Mass of 47 sets of 10 g for the local package
= 47 x 10
= 470 g
Greatest possible mass of the local package
= 60 + 470
= 530 g
Answer(s): 530 g