A is twice as good a work man as B and together they finish a piece of work in 14 days.The number of days taken by A alone to finish the work is :	Choose the correct choice.
A) 11  B) 21  C) 28  D) 42  E) None of these
Solution   (A’s 1 day’s work): (B’s 1 day’s work)= 2 : 1.   (A + B)'s 1 day’s work = 1/14   Divide 1/14 in the ratio 2 : 1.   ∴ A’s 1 day’s work = (1/14 x2/3)= 1/21   Hence,A alone can finish the work in 21 days.   Answer 21
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A is twice as good a work man as B and together they finish a piece of work in 14 days.The number of days taken by A alone to finish the work is :