The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
70¢ |
75¢ |
Every additional 10 g |
30¢ |
35¢ |
John paid $4.35 for posting a package overseas. What was the greatest possible mass of the package that John posted?
$1 = 100¢
$4.35 = 4.35 x 100 = 435¢
Amount that John paid for the additional sets of 10 g for the overseas package
= 435 - 75
= 360¢
Number of sets of 10 g that John paid for the overseas package
= 360 ÷ 10
= 36
Mass of 36 sets of 10 g for the overseas package
= 36 x 10
= 360 g
Greatest possible mass of the overseas package
= 70 + 360
= 430 g
Answer(s): 430 g