80% and 90% pure acid solutions are mixed to obtain 20 litre

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M: +2.00/-0.50

80% and 90% pure acid solutions are mixed to obtain 20 litres of 87% pure acid solution. Find the quantity (in litres) of 80% pure acid solution taken to form the mixture.

[SSC CGL 20th April 2022 Shift-1 With Answers]

A

8

B

6

C

4

D

9

EXPLANATION

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