Correct Answer: Option B
Suppose A, B and C take x, x/2 and x/3 days respectively to finish the work.
Then, (1/x +2/x + 3/x) = 1/2
=> 6/x = 1/2
=> x = 12.
So, B takes (12/2) = 6 days to finish the work.
Download our app for free and access thousands of MCQ questions with detailed solutions