How much water must be added to 60 litres of milk at 1.5 litres for Rs. 20 So as to have a mixture worth Rs.32/3 a litre?	Choose the correct choice
A) 10 litres	B) 12 litres	C) 15 litres of water	D) 18 litres	E) 21 litres
C.P. of 1 litre of milk = Rs. 20×2/3 = Rs. 40/3.   C.P. of 1 litre of water =Rs 0.   Mean price = Rs. 32/3.   By the rule of alligation, we have :   C.P of 1 litre C.P of 1 litre   of water of milk   (0) (Rs. 40/3)   \ /   Mean Price   (Rs. 32/3)   / \   40/3−32/3 32/(3−0)   8/3 32/3   The ratio of water and milk =8/3:32/3.   =8:32=1:4.   Thus, Quantity of water to be added to 60 litres of milk:   =(1/4)×60 litres.   =15 litres. ANSWER : 15 litres of water
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How much water must be added to 60 litres of milk at 1.5 litres for Rs. 20 So as to have a mixture worth Rs.32/3 a litre?