The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
45¢ |
60¢ |
Every additional 10 g |
20¢ |
25¢ |
Ryan paid $5.15 for posting a package locally. What was the greatest possible mass of the package that Ryan posted?
$1 = 100¢
$5.15 = 5.15 x 100 = 515¢
Amount that Ryan paid for the additional sets of 10 g for the local package
= 515 - 45
= 470¢
Number of sets of 10 g that Ryan paid for the local package
= 470 ÷ 10
= 47
Mass of 47 sets of 10 g for the local package
= 47 x 10
= 470 g
Greatest possible mass of the local package
= 70 + 470
= 540 g
Answer(s): 540 g