The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 70 g |
55¢ |
85¢ |
Every additional 10 g |
25¢ |
40¢ |
Simon paid $4.05 for posting a package locally. What was the greatest possible mass of the package that Simon posted?
$1 = 100¢
$4.05 = 4.05 x 100 = 405¢
Amount that Simon paid for the additional sets of 10 g for the local package
= 405 - 55
= 350¢
Number of sets of 10 g that Simon paid for the local package
= 350 ÷ 10
= 35
Mass of 35 sets of 10 g for the local package
= 35 x 10
= 350 g
Greatest possible mass of the local package
= 70 + 350
= 420 g
Answer(s): 420 g