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	Pick one:
A) 20 litres  B) 30 litres  C) 15 litres  D) 10 litres  E) 25 litres
Let the quantity of alcohol and water be 4x litres and 3x litres respectively   4x/(3x+5)=4/5 20x=4(3x+5)8x=20 x=2.5   Quantity of alcohol = (4 x 2.5) litres = 10 litres.   Option 10 litres
<result>D</result>
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