One test tube contains some acid and another test tube contains an equal quantity of water To p...........

Quantitative Aptitude ( CCS) Mixture and Alligation

One test tube contains some acid and another test tube contains an equal quantity of water .To prepare a solution , 20 g of the acid is poured into the second test tube .Then , two –third of the so- formed solution is poured from the second tube into the first .If the fluid in the first test tube is four times that in the second ,what quantity of water was taken initially ?

90 g

70 g

154 g

100g

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Explanation:

Let x g of water was taken initially .
1^st process
First test tube (x- 20)
second test tube (x +20)
2^nd process
First test tube = [(x-20) +2/3 (x+20)]
Second test tube = 1/3(x+20)
Now ,
(x -20 ) + 2/3(x+20) = 4* (1/3)(x+20)
=> x = 100 g