A mixture of 45 litres of spirit and water contains 20% of water. how much water must be added to make the water 25% in the new mixture?
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4
Vol of water needed to be added= (45×25÷100)-(45×20÷100) = (11.25-9)ml = 2.25ml Water
Answered by
4
According to question, quantity of water in the mixture
= 20/100×45 = 9 L
Let x L of water must be added to make the water 25% in the solution.
Therefore, 9+x / 45+x = 25/100
=> 36 + 4x = 45 + x
=> 3x = 9
=> x = 3L
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