PSLE The airmail rates to two countries are shown. Fanny sent a letter weighing 66g to Indonesia and a letter weighing 20g to China by airmail. How much did she pay altogether?
Mass |
Indonesia |
China |
First 30g |
$0.95 |
$1.70 |
Every additional 15g |
$0.65 |
$0.65 |
Mass of the letter to Indonesia excluding the first 30 g
= 66 - 30
= 36 g
Sets of additional 15 g of the letter to Indonesia
= 36 ÷ 15
= 2 r 6
Sets of additional 15 g and part thereof the letter to Indonesia
= 2 + 1
= 3
Amount that Fanny paid for the letter to Indonesia
= 0.95 + 3 x 0.65
= 0.95 + 1.95
= $2.90
Amount that Fanny paid altogether
= 2.90 + 1.70
= $4.60
Answer(s): $4.60