The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 60 g |
45¢ |
55¢ |
Every additional 10 g |
15¢ |
25¢ |
Peter paid $3.85 for posting a package locally. What was the greatest possible mass of the package that Peter posted?
$1 = 100¢
$3.85 = 3.85 x 100 = 385¢
Amount that Peter paid for the additional sets of 10 g for the local package
= 385 - 45
= 340¢
Number of sets of 10 g that Peter 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
= 60 + 340
= 400 g
Answer(s): 400 g