The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 40 g |
65¢ |
75¢ |
Every additional 10 g |
25¢ |
35¢ |
Andy paid $5.75 for posting a package overseas. What was the greatest possible mass of the package that Andy posted?
$1 = 100¢
$5.75 = 5.75 x 100 = 575¢
Amount that Andy paid for the additional sets of 10 g for the overseas package
= 575 - 75
= 500¢
Number of sets of 10 g that Andy paid for the overseas package
= 500 ÷ 10
= 50
Mass of 50 sets of 10 g for the overseas package
= 50 x 10
= 500 g
Greatest possible mass of the overseas package
= 40 + 500
= 540 g
Answer(s): 540 g