The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 40 g |
55¢ |
90¢ |
Every additional 10 g |
25¢ |
35¢ |
Luke paid $5.30 for posting a package overseas. What was the greatest possible mass of the package that Luke posted?
$1 = 100¢
$5.30 = 5.30 x 100 = 530¢
Amount that Luke paid for the additional sets of 10 g for the overseas package
= 530 - 90
= 440¢
Number of sets of 10 g that Luke paid for the overseas package
= 440 ÷ 10
= 44
Mass of 44 sets of 10 g for the overseas package
= 44 x 10
= 440 g
Greatest possible mass of the overseas package
= 40 + 440
= 480 g
Answer(s): 480 g