The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
45¢ |
90¢ |
Every additional 10 g |
15¢ |
40¢ |
Liam paid $1.75 for posting a package locally. What was the greatest possible mass of the package that Liam posted?
$1 = 100¢
$1.75 = 1.75 x 100 = 175¢
Amount that Liam paid for the additional sets of 10 g for the local package
= 175 - 45
= 130¢
Number of sets of 10 g that Liam paid for the local package
= 130 ÷ 10
= 13
Mass of 13 sets of 10 g for the local package
= 13 x 10
= 130 g
Greatest possible mass of the local package
= 70 + 130
= 200 g
Answer(s): 200 g