The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 40 g |
55¢ |
95¢ |
Every additional 10 g |
20¢ |
40¢ |
Ethan paid $1.75 for posting a package locally. What was the greatest possible mass of the package that Ethan posted?
$1 = 100¢
$1.75 = 1.75 x 100 = 175¢
Amount that Ethan paid for the additional sets of 10 g for the local package
= 175 - 55
= 120¢
Number of sets of 10 g that Ethan paid for the local package
= 120 ÷ 10
= 12
Mass of 12 sets of 10 g for the local package
= 12 x 10
= 120 g
Greatest possible mass of the local package
= 40 + 120
= 160 g
Answer(s): 160 g