The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 60 g |
55¢ |
80¢ |
Every additional 10 g |
25¢ |
30¢ |
Mark paid $1.65 for posting a package locally. What was the greatest possible mass of the package that Mark posted?
$1 = 100¢
$1.65 = 1.65 x 100 = 165¢
Amount that Mark paid for the additional sets of 10 g for the local package
= 165 - 55
= 110¢
Number of sets of 10 g that Mark paid for the local package
= 110 ÷ 10
= 11
Mass of 11 sets of 10 g for the local package
= 11 x 10
= 110 g
Greatest possible mass of the local package
= 60 + 110
= 170 g
Answer(s): 170 g