The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 90 g |
55¢ |
85¢ |
Every additional 10 g |
25¢ |
40¢ |
Tim paid $2.35 for posting a package locally. What was the greatest possible mass of the package that Tim posted?
$1 = 100¢
$2.35 = 2.35 x 100 = 235¢
Amount that Tim paid for the additional sets of 10 g for the local package
= 235 - 55
= 180¢
Number of sets of 10 g that Tim paid for the local package
= 180 ÷ 10
= 18
Mass of 18 sets of 10 g for the local package
= 18 x 10
= 180 g
Greatest possible mass of the local package
= 90 + 180
= 270 g
Answer(s): 270 g