The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
35¢ |
60¢ |
Every additional 10 g |
15¢ |
20¢ |
Ivan paid $2.55 for posting a package locally. What was the greatest possible mass of the package that Ivan posted?
$1 = 100¢
$2.55 = 2.55 x 100 = 255¢
Amount that Ivan paid for the additional sets of 10 g for the local package
= 255 - 35
= 220¢
Number of sets of 10 g that Ivan paid for the local package
= 220 ÷ 10
= 22
Mass of 22 sets of 10 g for the local package
= 22 x 10
= 220 g
Greatest possible mass of the local package
= 70 + 220
= 290 g
Answer(s): 290 g