The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 60 g |
45¢ |
65¢ |
Every additional 10 g |
15¢ |
25¢ |
Cole paid $2.35 for posting a package overseas. What was the greatest possible mass of the package that Cole posted?
$1 = 100¢
$2.35 = 2.35 x 100 = 235¢
Amount that Cole paid for the additional sets of 10 g for the overseas package
= 235 - 65
= 170¢
Number of sets of 10 g that Cole paid for the overseas package
= 170 ÷ 10
= 17
Mass of 17 sets of 10 g for the overseas package
= 17 x 10
= 170 g
Greatest possible mass of the overseas package
= 60 + 170
= 230 g
Answer(s): 230 g