PSLE The airmail rates to two countries are shown. Winnie sent a letter weighing 92g to Indonesia and a letter weighing 45g to India by airmail. How much did she pay altogether?
Mass |
Indonesia |
India |
First 50g |
$0.55 |
$1.60 |
Every additional 25g |
$0.15 |
$0.60 |
Mass of the letter to Indonesia excluding the first 50 g
= 92 - 50
= 42 g
Sets of additional 25 g of the letter to Indonesia
= 42 ÷ 25
= 1 r 17
Sets of additional 25 g and part thereof the letter to Indonesia
= 1 + 1
= 2
Amount that Winnie paid for the letter to Indonesia
= 0.55 + 2 x 0.15
= 0.55 + 0.30
= $0.85
Amount that Winnie paid altogether
= 0.85 + 1.60
= $2.45
Answer(s): $2.45