The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
50¢ |
80¢ |
Every additional 10 g |
20¢ |
30¢ |
Jeremy paid $2.10 for posting a package locally. What was the greatest possible mass of the package that Jeremy posted?
$1 = 100¢
$2.10 = 2.10 x 100 = 210¢
Amount that Jeremy paid for the additional sets of 10 g for the local package
= 210 - 50
= 160¢
Number of sets of 10 g that Jeremy paid for the local package
= 160 ÷ 10
= 16
Mass of 16 sets of 10 g for the local package
= 16 x 10
= 160 g
Greatest possible mass of the local package
= 70 + 160
= 230 g
Answer(s): 230 g