The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 60 g |
75¢ |
95¢ |
Every additional 10 g |
30¢ |
40¢ |
Neave paid $4.45 for posting a package overseas. What was the greatest possible mass of the package that Neave posted?
$1 = 100¢
$4.45 = 4.45 x 100 = 445¢
Amount that Neave paid for the additional sets of 10 g for the overseas package
= 445 - 95
= 350¢
Number of sets of 10 g that Neave paid for the overseas package
= 350 ÷ 10
= 35
Mass of 35 sets of 10 g for the overseas package
= 35 x 10
= 350 g
Greatest possible mass of the overseas package
= 60 + 350
= 410 g
Answer(s): 410 g