Correct Answer - Option 2 : 50 litres
GIVEN :
In a container contained 160 liters milk.
Few litres of milk is replaced by water then the quantity of milk will be 3 times the quantity of water.
CONCEPT :
Replacement of Mixture.
CALCULATION :
The quantity of milk is 160 litres
Few litres of milk replaced by water, then the quantity will be 3 times of the water
⇒ milk = 3 water
⇒ milk/water = 3/1
It means total quantity is (3 + 1) = 4 units
⇒ 4 units = 160 litres
⇒ 1 units = 40 litres
Then, Milk = 3 × 40
⇒ 120 litres
Water = 40 litres
According to the questions,
Again 20 litre of mixture withdraw
⇒ 160 – 20
⇒ 140 litres
Then quantity of milk and water ratio is same
⇒ 1 unit = 140/4
⇒ 1 unit = 35 litres
Milk = 3 × 35 = 105 litres and water = 35 litres
After added the water 15 litres, then quantity of water
⇒ 35 + 15
⇒ 50 litres
∴ The quantity of water in final mixture is 50 litres.