Mixtures and Allegations Practice Test 1

Question : 23 of 40

Marks: +1, -0

What amounts (in litres) of 90% and 97% of pure acid solutions are mixed to obtain 21 litres of 95% of pure acid solution?

Solution:

Amount of acid obtained from 90% is

=2/7× 21

= 6 litre
Amount of acid obtained from 97% is

=5/7× 21

= 15 litre

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