The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
55¢ |
65¢ |
Every additional 10 g |
25¢ |
30¢ |
Cody paid $3.85 for posting a package overseas. What was the greatest possible mass of the package that Cody posted?
$1 = 100¢
$3.85 = 3.85 x 100 = 385¢
Amount that Cody paid for the additional sets of 10 g for the overseas package
= 385 - 65
= 320¢
Number of sets of 10 g that Cody paid for the overseas package
= 320 ÷ 10
= 32
Mass of 32 sets of 10 g for the overseas package
= 32 x 10
= 320 g
Greatest possible mass of the overseas package
= 70 + 320
= 390 g
Answer(s): 390 g