1. A jar contains a mixture of two liquids A and B in the ratio 4 : 1. When 10 litre of the mixture is replaced with liquid B, the ratio becomes 2 : 3. The volume of liquid A present in the jar earlier was:
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By: anil on 05 May 2019 01.59 am
$$frac{QNR}{total} = frac{QNR(initial)}{total} (1- frac{ extrm{Replaced Quantity}}{total})$$ QNR is the quantity which has not entered again so here QNR is A $$frac{A}{5x} = frac{4x}{5x} (1- frac{10}{5x})$$ A = 4(x- 2) B = 5x - 4x + 8 = x+3 $$frac{4x-8}{x+3} = frac{2}{3}$$ 12x - 24 = 2x + 6 10 x = 30 x = 3 so volume = 5x = 5 x 3 = 15 ltr
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