A laboratory has a tank containing 500 gallons of 60% salt solution in water. On heating it, water starts evaporating. How much water should evaporate such that the resultant solution contains 75% salt?
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Answer:
75 gallon
Step-by-step explanation:
initially
100%=500 gallons
60% of 500 is salt=300 gallons
remaining (100-60)%=40% of
500 is water=200 gallons
RESULTANT SOLUTION HAS
75% of solution =75% of
500=375 gallons
so remaining (500-375)=125 gallons
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