The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 80 g |
35¢ |
85¢ |
Every additional 10 g |
15¢ |
40¢ |
Tom paid $1.55 for posting a package locally. What was the greatest possible mass of the package that Tom posted?
$1 = 100¢
$1.55 = 1.55 x 100 = 155¢
Amount that Tom paid for the additional sets of 10 g for the local package
= 155 - 35
= 120¢
Number of sets of 10 g that Tom paid for the local package
= 120 ÷ 10
= 12
Mass of 12 sets of 10 g for the local package
= 12 x 10
= 120 g
Greatest possible mass of the local package
= 80 + 120
= 200 g
Answer(s): 200 g