The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 90 g |
55¢ |
80¢ |
Every additional 10 g |
25¢ |
35¢ |
Neave paid $3.30 for posting a package overseas. What was the greatest possible mass of the package that Neave posted?
$1 = 100¢
$3.30 = 3.30 x 100 = 330¢
Amount that Neave paid for the additional sets of 10 g for the overseas package
= 330 - 80
= 250¢
Number of sets of 10 g that Neave paid for the overseas package
= 250 ÷ 10
= 25
Mass of 25 sets of 10 g for the overseas package
= 25 x 10
= 250 g
Greatest possible mass of the overseas package
= 90 + 250
= 340 g
Answer(s): 340 g