You are given a 4l and 5l jar completely filled and an empty jar . You have to fill empty jar to 7l. Refilling of beakers was not allowed. Water can neither be thrown, it can only be transferred from one jar to another.
Answers
Here are the steps of refilling the empty bottle to 7 liters:
1) Pour the 4 liters of water from the 4 liter jar into the empty jar.
- The empty jar now has 4 liters of water while the 4 liter jar is empty.
2) Pour the 5 liters of water into the empty 4 liter jar.
- The 5 liter jar will have 1 liter left in it.
- The 4 liter jar is now full of 4 liters of water
- The initial empty jar has 4 liters of water.
3) Pour the water from the 4 liter jar into the initial empty jar.
- The 4 liter jar is now empty
- The initial empty jar now has 8 liters of water.
- The 5 liter jar has 1 liter of water.
4) Transfer the 1 liter of water from the 5 liter jar to the 4 liter jar.
5) Fill the 5 liter jar with the water from the initial empty jar ( contains 8 liters).
- The water left in the initial empty jar is 8 liters - 5 liters = 3 liters.
- The initial empty jar now has 3 liters of water.
6) Fill the 4 liter jar with water from the 5 liter jar
7) Transfer water from the 4 liter jar into the initial empty jar containing 3 liters of water.
The jar will now have:
3 liters + 4 liters = 7 liters of water
Answer:
Explanation:first fill the water in to 5L
And transfer total 5L to empty jar(I. E empty jar=5L)
Then fill the 4L jar and transfer to 5L jar I. E now we have 4L of water in 5L jar again fill the 4L jar and transfer 1L to 5L jar now we have 5L in 5L jar and 3L of water in 4L jar, transfer the 3L to empty jar, now we have total 8L in empty jar, and again fill the 4L jar with 5L (because we have already 5L of water 5L jar, now 5L jar have 1L) and transfer to empty jar, now we have 12 in empty jar, now 4L is empty fill the 4L jar with 1L of 5 L jar I. E 5L is empty, now fill the 5L jar with 12L of empty jar
,therefore we have 7L in empty jar