The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 50 g |
50¢ |
70¢ |
Every additional 10 g |
20¢ |
25¢ |
Luis paid $3.50 for posting a package overseas. What was the greatest possible mass of the package that Luis posted?
$1 = 100¢
$3.50 = 3.50 x 100 = 350¢
Amount that Luis paid for the additional sets of 10 g for the overseas package
= 350 - 70
= 280¢
Number of sets of 10 g that Luis paid for the overseas package
= 280 ÷ 10
= 28
Mass of 28 sets of 10 g for the overseas package
= 28 x 10
= 280 g
Greatest possible mass of the overseas package
= 50 + 280
= 330 g
Answer(s): 330 g