The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
40¢ |
90¢ |
Every additional 10 g |
15¢ |
40¢ |
Luis paid $4.30 for posting a package locally. What was the greatest possible mass of the package that Luis posted?
$1 = 100¢
$4.30 = 4.30 x 100 = 430¢
Amount that Luis paid for the additional sets of 10 g for the local package
= 430 - 40
= 390¢
Number of sets of 10 g that Luis paid for the local package
= 390 ÷ 10
= 39
Mass of 39 sets of 10 g for the local package
= 39 x 10
= 390 g
Greatest possible mass of the local package
= 70 + 390
= 460 g
Answer(s): 460 g