A is twice as good a workman as B and together they finish a piece of work in 14 days. The number of days that A alone will take to finish the work is:
Answer & explanation
Correct answer: option 2
Total work = Efficiency × Time
A : B
Efficiency 2 : 1
Total work = 14 ( 2 + 1 )
= 42
Time taken by A alone to complete the work = \(\frac{ 42 }{ 2 }\)
= 21
The correct answer is Option (2) → 21