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Question

# In a 729 liters mixture if milk and water , the ratio of milk to water is 7:2 to get a new mixture containing milk and water in the ratio of 7:3, the amount of water to be added is :

A
81
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B
71
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C
56
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D
50
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Solution

## The correct option is A 81Total mixture=729 liters Amount of milk in mixture =79×729=567liters Amount of water in mixture =29×729=162liters Let x liter is water is added to get the ratio 7:3 then ⇒567162+x=73 ⇒1701=1134+7x ⇒7x=567 ⇒x=81liters Hence 81 liters water is added.

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