The table shows the postage rates for posting mail locally and overseas.
Mass |
Local Postage |
Overseas Postage |
First 80 g |
75¢ |
90¢ |
Every additional 10 g |
30¢ |
40¢ |
Ryan paid $2.80 for posting a package overseas. What was the greatest possible mass of the package that Ryan posted?
$1 = 100¢
$2.80 = 2.80 x 100 = 280¢
Amount that Ryan paid for the additional sets of 10 g for the overseas package
= 280 - 90
= 190¢
Number of sets of 10 g that Ryan paid for the overseas package
= 190 ÷ 10
= 19
Mass of 19 sets of 10 g for the overseas package
= 19 x 10
= 190 g
Greatest possible mass of the overseas package
= 80 + 190
= 270 g
Answer(s): 270 g