Question

There is a 5l jar and a 3l jar and an another jar is given to you(without dimensions) and infinite supply of water is there, how you will collect 4 litres in the dimensionless jar? You cannot throw water outside.

Answer 1

Step by step procedure of getting 4 liters water with a 5 liter and 3 liter jar is as below.

• First I will fill the 5 Liter Jar with water.
• After that I will pour water from the 5 liter Jar to 3 liter Jar.
• So now the 5 Liter Jar has 2 liters of water.
• I will pour those 2 liters of water in the dimensionless Jar.
• So the dimensionless jar will have now 2 liters of water.
• I will pour the 3 liters water from the 3 liter jar to the 5 liter jar.
• Now the 5 Liter jar has 3 liters of water and the 3 liter Jar is completely empty.
• Now I fill the remaining part of the 5 liter jar with the infinite supply of water.
• Now again I will pour the water from 5 liter jar to 3 liter jar.
• So the 5 liter jar will have 2 liters of water remains.  
• I will pour the 2 liters water from 5 liter jar to the dimensionless jar which already has 2 liters water in it.
• So the amount of water in the dimensionless jar will be now 2 liters +2 liters=4 liters.  

Answer 2

Step-by-step explanation:

• Fill the 5 litre jar with water. (5L- 5, 3L - 0, DL - 0)

• Fill the 3 litre jar by pouring water from 5 litre jar.

(5L- 2, 3L - 3, DL - 0)

• Now pour water from 3L to DL (5L- 2, 3L - 0, DL - 3)

• Now pour water from 5L to 3L (5L- 0, 3L - 2, DL - 3)

• Now fill 5L fully (5L- 5, 3L - 2, DL - 0)

• Now pour to 3L from 5L until 3L is full

(5L- 4, 3L - 3, DL - 3)

* you have 4 litres in 5L can

* 5L - 5 litre can, 3L - 3 litre can, DL - dimensionless can