The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
60¢ |
90¢ |
Every additional 10 g |
25¢ |
35¢ |
Tommy paid $3.60 for posting a package locally. What was the greatest possible mass of the package that Tommy posted?
$1 = 100¢
$3.60 = 3.60 x 100 = 360¢
Amount that Tommy paid for the additional sets of 10 g for the local package
= 360 - 60
= 300¢
Number of sets of 10 g that Tommy paid for the local package
= 300 ÷ 10
= 30
Mass of 30 sets of 10 g for the local package
= 30 x 10
= 300 g
Greatest possible mass of the local package
= 70 + 300
= 370 g
Answer(s): 370 g