A dishonest milkman professes to sell his milk at cost price but he mixes it with water and thereby gains 25%. The percentage of water in the mixture is:	Choose the correct option:	A) 4%	B) 61/4%	C) 20%	D) 25%	E) 30%
Let C.P. of 1 litre milk be Re. 1   Then, S.P. of 1 litre of mixture = Re. 1, Gain = 25%.   20%P of 1 lr = 100/125*1 = 4/5   Ratio of milk to water = 4/5:1/5 = 4:1   =20%   ANSWER 20%
<result>C</result>
A dishonest milkman professes to sell his milk at cost price but he mixes it with water and thereby gains 25%. The percentage of water in the mixture is: