PSLE The airmail rates to two countries are shown. Eva sent a letter weighing 79g to Indonesia and a letter weighing 22g to Sweden by airmail. How much did she pay altogether?
Mass |
Indonesia |
Sweden |
First 30g |
$0.95 |
$1.20 |
Every additional 15g |
$0.75 |
$0.30 |
Mass of the letter to Indonesia excluding the first 30 g
= 79 - 30
= 49 g
Sets of additional 15 g of the letter to Indonesia
= 49 ÷ 15
= 3 r 4
Sets of additional 15 g and part thereof the letter to Indonesia
= 3 + 1
= 4
Amount that Eva paid for the letter to Indonesia
= 0.95 + 4 x 0.75
= 0.95 + 3.00
= $3.95
Amount that Eva paid altogether
= 3.95 + 1.20
= $5.15
Answer(s): $5.15