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729 ml of mixture contains milk and water in the ratio 7:2. How much more water is to be added to get a new mixture containing milk and water in the ratio 7:3?

A600 ml

B710 ml

C520 ml

D81 ml

Answer:

D. 81 ml

Read Explanation:

milk=729x7=567 ml Water = 729-567-162ml 567/(162+x)=7/3 1134+7x=1701 7x=1701-1134=567 x=81


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