COMPETZ - Makes You Compete
Answer with Explanation:
Suppose A, B and C take x,x/2 and x/3 days respectively to finish the work.
(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.
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