The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 40 g |
80¢ |
90¢ |
Every additional 10 g |
35¢ |
40¢ |
Jenson paid $2.70 for posting a package overseas. What was the greatest possible mass of the package that Jenson posted?
$1 = 100¢
$2.70 = 2.70 x 100 = 270¢
Amount that Jenson paid for the additional sets of 10 g for the overseas package
= 270 - 90
= 180¢
Number of sets of 10 g that Jenson paid for the overseas package
= 180 ÷ 10
= 18
Mass of 18 sets of 10 g for the overseas package
= 18 x 10
= 180 g
Greatest possible mass of the overseas package
= 40 + 180
= 220 g
Answer(s): 220 g