The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 40 g |
65¢ |
85¢ |
Every additional 10 g |
25¢ |
40¢ |
Luke paid $5.65 for posting a package locally. What was the greatest possible mass of the package that Luke posted?
$1 = 100¢
$5.65 = 5.65 x 100 = 565¢
Amount that Luke paid for the additional sets of 10 g for the local package
= 565 - 65
= 500¢
Number of sets of 10 g that Luke paid for the local package
= 500 ÷ 10
= 50
Mass of 50 sets of 10 g for the local package
= 50 x 10
= 500 g
Greatest possible mass of the local package
= 40 + 500
= 540 g
Answer(s): 540 g