utets13 q117

0. In 30 L mixture of milk and water the ratio of milk and water is 7 : 3. How much more water is added in mixture, so that the ratio become 3 : 7?

Answer
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Option : D
Explanation : (D) In 30 L of mixture, milk is 21 L and water is 9 L. Let x L of water needs to be added.

⇒ 147 = 27 + 3x
⇒ 120= 3x
⇒ x = 40L

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