The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 60 g |
45¢ |
95¢ |
Every additional 10 g |
15¢ |
45¢ |
Ken paid $3.05 for posting a package overseas. What was the greatest possible mass of the package that Ken posted?
$1 = 100¢
$3.05 = 3.05 x 100 = 305¢
Amount that Ken paid for the additional sets of 10 g for the overseas package
= 305 - 95
= 210¢
Number of sets of 10 g that Ken paid for the overseas package
= 210 ÷ 10
= 21
Mass of 21 sets of 10 g for the overseas package
= 21 x 10
= 210 g
Greatest possible mass of the overseas package
= 60 + 210
= 270 g
Answer(s): 270 g