The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 40 g |
45¢ |
90¢ |
Every additional 10 g |
20¢ |
35¢ |
Fabian paid $3.25 for posting a package locally. What was the greatest possible mass of the package that Fabian posted?
$1 = 100¢
$3.25 = 3.25 x 100 = 325¢
Amount that Fabian paid for the additional sets of 10 g for the local package
= 325 - 45
= 280¢
Number of sets of 10 g that Fabian paid for the local package
= 280 ÷ 10
= 28
Mass of 28 sets of 10 g for the local package
= 28 x 10
= 280 g
Greatest possible mass of the local package
= 40 + 280
= 320 g
Answer(s): 320 g