The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 90 g |
45¢ |
80¢ |
Every additional 10 g |
20¢ |
35¢ |
Sean paid $1.45 for posting a package locally. What was the greatest possible mass of the package that Sean posted?
$1 = 100¢
$1.45 = 1.45 x 100 = 145¢
Amount that Sean paid for the additional sets of 10 g for the local package
= 145 - 45
= 100¢
Number of sets of 10 g that Sean paid for the local package
= 100 ÷ 10
= 10
Mass of 10 sets of 10 g for the local package
= 10 x 10
= 100 g
Greatest possible mass of the local package
= 90 + 100
= 190 g
Answer(s): 190 g