The table shows the airmail rates for sending letters and postcards to some countries.
Destination |
Letters |
Postcards |
|
Mass |
Postage Rate |
Per piece |
Korea, Japan
|
1st 30 g |
$1.20 |
$0.70
|
Every additional 10 g or part thereof |
$0.25 |
How much did Linda pay for the postage when she sent a letter which weighed 53 g and 5 postcards to Japan by airmail?
Remaining mass that Linda had to pay for the letter as it was more than 30 g
= 53 - 30
= 23 g
Number of sets of additional 10 g of the letter that Linda had to pay for
= 23 ÷ 10
= 2 r 3
Total number of sets of additional 10 g of the letter that Linda had to pay for
= 2 + 1
= 3
Amount that Linda had to pay for the sets of additional 10 g of the letter
= 3 x 0.25
= $0.75
Total amount that Linda had to pay for the letter
= 1.20 + 0.75
= $1.95
Amount that Linda had to pay for the 5 postcards
= 5 x 0.70
= $3.50
Total amount that Linda paid
= 1.95 + 3.50
= $5.45
Answer(s): $5.45