Question

68kg of a mixture contains milk and water in the ratio 27: 7 How much more water is to be added to this mixture to get a new mixture containing milk and water in the ratio 3:1
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Answer 1

Answer:4kg

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Total weight of mixture=68kg

Ratio of milk and water=27:7

Sum of ratios=27+7=34

Quantity of milk=68*27/34=54kg

and water=68*7/34=14kg

Let x kg of water be added,then

Quantity of milk=54kg

Quantity of water=(14+x)kg

Total mixture=54+4+x=68+x kg

Ratio of new mixture=3:1

=54/14+x=3/1

42+3x=54

3x=54-42=12

x=12/3

=4kg Ans.(4kg of water be added).