A and B can complete a task in 12 days together. A is 25% more efficient than B. What percentage of the work is done by A alone?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 55.56%.
A 25% more efficient than B.
Let B’s efficiency = 4 units/day
A’s efficiency = 5 units/day
Efficiency of both persons = 5 + 4 = 9 units/day
Total work = 12 × 9 = 108 units
A’s work = 5 × 12 = 60 units
Percentage of work by A = (60/108) × 100 ≈ 55.56%