The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 80 g |
40¢ |
70¢ |
Every additional 10 g |
15¢ |
25¢ |
Jenson paid $2.80 for posting a package overseas. What was the greatest possible mass of the package that Jenson posted?
$1 = 100¢
$2.80 = 2.80 x 100 = 280¢
Amount that Jenson paid for the additional sets of 10 g for the overseas package
= 280 - 70
= 210¢
Number of sets of 10 g that Jenson paid for the overseas package
= 210 ÷ 10
= 21
Mass of 21 sets of 10 g for the overseas package
= 21 x 10
= 210 g
Greatest possible mass of the overseas package
= 80 + 210
= 290 g
Answer(s): 290 g