Answer: 900 liters
Explanation:
Given : Four horses are pulling a wagon.
Each horse drinks 45,000 milliliter of water each day.
We know that 1 liter = 1000 milliliters
Then, 1 milliliter=
liter
⇒45,000 milliliters =
liters
i.e. Each horse drinks 45 liters of water each day.
Then, amount of water drunk by 4 horses each day =

⇒ Amount of horses will drink in 5 days =

Hence, the horse will drink 900 liters of water in 5 days.