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 |
30¢ |
35¢ |
Harry paid $4.65 for posting a package overseas. What was the greatest possible mass of the package that Harry posted?
$1 = 100¢
$4.65 = 4.65 x 100 = 465¢
Amount that Harry paid for the additional sets of 10 g for the overseas package
= 465 - 75
= 390¢
Number of sets of 10 g that Harry paid for the overseas package
= 390 ÷ 10
= 39
Mass of 39 sets of 10 g for the overseas package
= 39 x 10
= 390 g
Greatest possible mass of the overseas package
= 40 + 390
= 430 g
Answer(s): 430 g