A mixture contains alcohol and water in the ratio 4 : 3.

A mixture contains alcohol and water in the ratio 4 : 3. If 5 litres of water is added to the mixture, the ratio becomes 4 : 5. The quantity of alcohol in the given mixture is

In original mixture,
Alcohol = 4x litres
Water = 3x litres
On adding 5 litres of water,

4x	=	4
3x + 5	=	5

⇒ 20x = 12x + 20
⇒ 8x = 20

⇒ x =	20	=	5
	8		2

⇒ Quantity of alcohol

= 4x = 4 ×	5
	2

= 10 litres