The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
55¢ |
95¢ |
Every additional 10 g |
25¢ |
45¢ |
John paid $5.75 for posting a package overseas. What was the greatest possible mass of the package that John posted?
$1 = 100¢
$5.75 = 5.75 x 100 = 575¢
Amount that John paid for the additional sets of 10 g for the overseas package
= 575 - 95
= 480¢
Number of sets of 10 g that John paid for the overseas package
= 480 ÷ 10
= 48
Mass of 48 sets of 10 g for the overseas package
= 48 x 10
= 480 g
Greatest possible mass of the overseas package
= 70 + 480
= 550 g
Answer(s): 550 g