The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 90 g |
40¢ |
90¢ |
Every additional 10 g |
15¢ |
40¢ |
Bryan paid $3.80 for posting a package locally. What was the greatest possible mass of the package that Bryan posted?
$1 = 100¢
$3.80 = 3.80 x 100 = 380¢
Amount that Bryan paid for the additional sets of 10 g for the local package
= 380 - 40
= 340¢
Number of sets of 10 g that Bryan paid for the local package
= 340 ÷ 10
= 34
Mass of 34 sets of 10 g for the local package
= 34 x 10
= 340 g
Greatest possible mass of the local package
= 90 + 340
= 430 g
Answer(s): 430 g