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प्रश्न
In a 120 litre of solution of Acid and water, acid is 75%. A person takes out 20 litres of this solution and added 16.2 litres of acid and 3.8 litres of water in the remaining solution. What is the percentage of water in the final solution?
विकल्प
22
24
25
28
उत्तर
24
Explanation:
In 100 `"l"`,
Acid`=100xx75/100=75 l.`
water = 100 − 75 = 25`l.`
when, 16.2 `l` acid and 3.8 `l` water added,
then, water = 25 + 3.8 = 28.8 `l`.
total volume of solution,
= 100 + 16.2 + 3.8 = 120 `l`.
water %`=28.8/120xx100=24%.`
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