A is twice as good a workman as B, and together they finish a piece of work in 18 days. In how many days will B alone finish the work?
A
27 days
B
54 days
C
56 days
D
68 days
Correct Option:
B
Explanation
Let B's efficiency = 1 unit and A's = 2 units. Together = 3 units, and they finish in 18 days. Therefore, B alone needs 18×3 = 54 days. Being twice as efficient does not mean half the combined time—the combined efficiency matters.
