In a mixture 60 litres, the ratio of milk and water 2 : 1. If this ratio is to be 1 : 2, then the quanity of water to be further added is: Select the correct option
A) 20 litres B) 30 litres C) 40 litres D) 60 litres E) none
Quantity of milk = (60 * 2/3)= 
<gadget id="calculator">(60 * 2/3)</gadget>
<output>40</output>
40 litres.   Quantity of water in it= (60- 40)= 
<gadget id="calculator">(60- 40)</gadget>
<output>20</output>
20 litres.   New ratio= 1 : 2   Let quantity of water to be added further be x litres.   Then, milk : water = (40 / (20+x))   Now, (40 / (20+x)) = 1/2   20 + x = 80   x = 60.   Quantity of water to be added = 60 litres.   Answer = 60 litres
<result>D</result>
In a mixture 60 litres, the ratio of milk and water 2 : 1. If this ratio is to be 1 : 2, then the quanity of water to be further added is: