Uma shankar has one litre of salt solution which has 30% salt.he wants to dilute the solution the adding water, so that he gets a solution having 20% salt.find the amount of water that he has to add.
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Answer:
Step-by-step explanation:
Answer is 500 ml.
Let x ml of water be added.
To make 20% salt solution, we must have 80% water.
(700+x)/(1000+x)=80/100
Solving the equation we get x=500
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