1)

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. Find the quantity of alcohol in the given mixture.


A) 9

B) 10

C) 12

D) 14

E) 16

Answer:

Option B

Explanation:

Let the quantity of alcohol and water be 4x litres and 3x litres respectively.

Then, 4x3x+5 =45

20x=4(3x+5)

8x=20  x=2.5

Quantity of alcohol =(4×2.5) litres = 10 litres.