I have two jars of 5 litres and 3 litres. How can I measure 4 litres? (Assume: Infinite supply of water and no third jar is present)

Question

Accepted Answer

Start with the 5-liter jar full: (5L, 0L)
Transfer from 5L to 3L: Move 3 liters to the 3-liter jar. (2L, 3L)
Empty the 3-liter jar: (2L, 0L)
Transfer the remaining 2 liters to the 3-liter jar: (0L, 2L)
Fill the 5-liter jar again: (5L, 2L)
Transfer 1 liter from the 5-liter jar to the 3-liter jar: Now the 3-liter jar has 3 liters, and the 5-liter jar has 4 liters. (4L, 3L)

Accepted Answer

Fill both the jars half. Jar A= 2.5 liters, Jar B = 1.5. Add them 2.5+1.5 = 4 liters.

Accepted Answer

Simply, From the jar containing 5 liters of water, Pour 1-liter of water into the jar having 3 liters of water.

Now you have one jar of 4 liters in your right hand and the other 4 liters jar in your left hand.

Accepted Answer

1) Suppose jar having 5 litres capacity be A and that of 3 litres capacity be B.

2) Fill the jar A with water.

2) Take out 3 litres from A with the help of jar B.

4) Remaining water in jar A is now equal to 2 litres.

5) Throw away the water from jar B.

6) Transfer the remaining water from jar A to jar B.

7) Now jar A will have 0 litres and B will have 2 litres of water.

8) Again fill the jar A.

9) Add water from jar A to jar B until it is full. Since the amout of water available in jar B was previously 2 litres so it will take maximum of 1 litre from the jar A.

10) So remaining water in jar A = (5-1) = 4 litres.

This is how we can measure 4 litres.

I have two jars of 5 litres and 3 litres. How can I measure 4 litres? (Assume: Infinite supply of water and no third jar is present)

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