Hii shubham, I just solve this question and I pleased to share my answer with you…

So here’s the answer of your question:-

You can measure exactly 4 gallons of water using the 3-gallon jug and the 5-gallon jug by following these steps:

1. Fill the 5-gallon jug completely.
2. Pour water from the 5-gallon jug into the 3-gallon jug until the 3-gallon jug is full. This leaves you with 2 gallons in the 5-gallon jug.
3. Empty the 3-gallon jug.
4. Pour the 2 gallons from the 5 -gallon jug into the 3-gallon jug.
5. Fill the 5 -gallon jug completely again.
6. Pour water from the 5 -Gallon jug into the 3-gallon jug until the 3-gallon jug is full. Since the 3-gallon jug already has 2 gallons in it, you can only add 1 more gallon from the 5 -gallon jug.

Now, you have exactly 4 gallons left in the 5-gallon jug.

Hope you understand this well and in case of any query I resolve it for you for better understanding.