PSLE The airmail rates to two countries are shown. Lynn sent a letter weighing 94g to Indonesia and a letter weighing 47g to Switzerland by airmail. How much did she pay altogether?
Mass |
Indonesia |
Switzerland |
First 50g |
$0.75 |
$1.70 |
Every additional 25g |
$0.55 |
$0.75 |
Mass of the letter to Indonesia excluding the first 50 g
= 94 - 50
= 44 g
Sets of additional 25 g of the letter to Indonesia
= 44 ÷ 25
= 1 r 19
Sets of additional 25 g and part thereof the letter to Indonesia
= 1 + 1
= 2
Amount that Lynn paid for the letter to Indonesia
= 0.75 + 2 x 0.55
= 0.75 + 1.10
= $1.85
Amount that Lynn paid altogether
= 1.85 + 1.70
= $3.55
Answer(s): $3.55