The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 90 g |
75¢ |
95¢ |
Every additional 10 g |
30¢ |
40¢ |
Bryan paid $2.15 for posting a package locally. What was the greatest possible mass of the package that Bryan posted?
$1 = 100¢
$2.15 = 2.15 x 100 = 215¢
Amount that Bryan paid for the additional sets of 10 g for the local package
= 215 - 75
= 140¢
Number of sets of 10 g that Bryan paid for the local package
= 140 ÷ 10
= 14
Mass of 14 sets of 10 g for the local package
= 14 x 10
= 140 g
Greatest possible mass of the local package
= 90 + 140
= 230 g
Answer(s): 230 g