Question:A mixture contains milk and water in the ratio `5 : 1`. On adding `5` litres of water, the ratio of milk to water becomes `5 : 2`. The quantity of milk in the original mixture is : 

A `16` litres 
B `25` litres 
C `22.75` litres 
D `32.5` litres 

+ Answer
B 

+ Explanation
Let milk `= 5x` and water `= x`. Then,

`(5x)/(x + 5) = 5/2` or

`10x = 5x + 25` or

`x = 5`.

`:.` Quantity of milk in given mix.

`= 25` litres.

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Md. Habib Ullah

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