Question

What quantity of water should be taken out to concentrate 12 litres of 30% acidic liquid to
40% acidic liquid.
(1) 4 litres
(2) 6 litres
(3) 3 litres
(4) 8 litres
(5) None of these
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Answer 1

Answer:

2

Step-by-step explanation:

second one is time I am thinking