Question

How much pure alcohol should be added to of strength to make its strength ?

A

B

C

D

Medium

Solution

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Correct option is C)

The amount of alcohol in solution of strength

Let the required amount of alcohol to be added ml.
It will increase the amount of the solution by ml.

The amount of alcohol now
and the amount of the solution.
Then, the strength

.
So, the required amount of pure alcohol to be added .

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