The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
40¢ |
95¢ |
Every additional 10 g |
15¢ |
40¢ |
Glen paid $2.25 for posting a package overseas. What was the greatest possible mass of the package that Glen posted?
$1 = 100¢
$2.25 = 2.25 x 100 = 225¢
Amount that Glen paid for the additional sets of 10 g for the overseas package
= 225 - 95
= 130¢
Number of sets of 10 g that Glen paid for the overseas package
= 130 ÷ 10
= 13
Mass of 13 sets of 10 g for the overseas package
= 13 x 10
= 130 g
Greatest possible mass of the overseas package
= 70 + 130
= 200 g
Answer(s): 200 g