The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 60 g |
65¢ |
85¢ |
Every additional 10 g |
30¢ |
40¢ |
Liam paid $5.55 for posting a package overseas. What was the greatest possible mass of the package that Liam posted?
$1 = 100¢
$5.55 = 5.55 x 100 = 555¢
Amount that Liam paid for the additional sets of 10 g for the overseas package
= 555 - 85
= 470¢
Number of sets of 10 g that Liam paid for the overseas package
= 470 ÷ 10
= 47
Mass of 47 sets of 10 g for the overseas package
= 47 x 10
= 470 g
Greatest possible mass of the overseas package
= 60 + 470
= 530 g
Answer(s): 530 g