Answer :
There are 4 quarts in each gallon.
It would take 2 fills of the canteen to make one gallon.
2x5=10
Also, this image may be helpful.
It would take 2 fills of the canteen to make one gallon.
2x5=10
Also, this image may be helpful.
You exchange the gallon to quarts
5*4=20
Then divide by 2 which is her canteen
20\2= 10