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How much pure alcohol be added to 400...

How much pure alcohol be added to 400 ml of a 15% solution to make its strength 32%?

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The correct Answer is:
`100ml`
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RS AGGARWAL-LINEAR EQUATION IN ONE VARIABLE-EXERCISE 7 B
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  14. Two complementary angles differ by 8^(@) . Find the angles.

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  20. How much pure alcohol be added to 400 ml of a 15% solution to make ...

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