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 :
Select
A) 11 B) 21 C) 28 D) 42 E) 45
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 1/14in the ratio 2 : 1.   ∴ A’s 1 day’s work = (1/14 x 2/3)= 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 :