One litre of water is added to 10 litres of a 40% solution of alcohol in water. What is the final strength of the alcohol.
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40% of alcohol in 10L soln is = 4L of Alcohol and 6L of Water.
1L water is added in Total soln.
Therefore total soln= 11L
Strength of alcohol = 4/11*100= 36.36%
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