Question

from 90 litres of pure milk 9 literes is withdrawn and replaced by water. 9 litres of the mixture is then withdrawn and replaced by water. find the ratio of milk and water in the present mixture.

Answer 1

2:3 is the ratio of the milk and water





had me for brainleast

Answer 2

Answer:

Ratio of milk and water in the present mixture is 81 : 19.

Step-by-step explanation:

We have 90 liter of pure milk.

When 9 liter of milk is replaced with water, w have

Quantity of mixture = 90 liter

Quantity of milk = 81 liter

Quantity of water = 9 liter

ratio of milk and water = 81 : 9 = 9 : 1

9 liter of mixture is taken out.

⇒ Quantity of milk taken out = 9/10 × 9 = 8.1 liter

⇒ Quantity of water taken out = 1/10 × 9 = 0.9 liter

then 9 liter water is replaced with taken out mixture.

⇒ Quantity of milk in mixture = 81 - 8.1 = 72.9 liter

⇒ Quantity of water taken out = 9 - 0.9 + 9 = 17.1 liter

Ratio of milk and water = 72.9 : 17.1 = 729 : 171 = 81 : 19

Therefore, Ratio of milk and water in the present mixture is 81 : 19.