The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 90 g |
40¢ |
95¢ |
Every additional 10 g |
15¢ |
45¢ |
Ben paid $3.30 for posting a package locally. What was the greatest possible mass of the package that Ben posted?
$1 = 100¢
$3.30 = 3.30 x 100 = 330¢
Amount that Ben paid for the additional sets of 10 g for the local package
= 330 - 40
= 290¢
Number of sets of 10 g that Ben paid for the local package
= 290 ÷ 10
= 29
Mass of 29 sets of 10 g for the local package
= 29 x 10
= 290 g
Greatest possible mass of the local package
= 90 + 290
= 380 g
Answer(s): 380 g