Q363
Two vessels contain equal quantities of 40% alcohol. Sachin changed the concentration of the first vessel to 50% by adding extra quantity of pure alcohol. Vivek changed the concentration of the second vessel to 50% replacing a certain quantity of the solution with pure alcohol. By what percentage is the quantity of alcohol added by Sachin more/less than that replaced by Vivek ?
A.
% less
B.
% more
C.
% less
D.
% more
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Let each vessel contain 100 litres of 40% alcoholSuppose Sachine added x litres of pure alcohol.
Then,
Suppose Vivek replaced y litres.
Then, alcohol in y litres = 40% of y =
Required percentage :