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¢ |
40¢ |
Xavier paid $5.50 for posting a package overseas. What was the greatest possible mass of the package that Xavier posted?
$1 = 100¢
$5.50 = 5.50 x 100 = 550¢
Amount that Xavier paid for the additional sets of 10 g for the overseas package
= 550 - 90
= 460¢
Number of sets of 10 g that Xavier paid for the overseas package
= 460 ÷ 10
= 46
Mass of 46 sets of 10 g for the overseas package
= 46 x 10
= 460 g
Greatest possible mass of the overseas package
= 40 + 460
= 500 g
Answer(s): 500 g