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
Efficiency of A + B = Work completed in 12 days; A is 25% more efficient than B.
According to the formula:
Efficiency Ratio = 125 : 100 = 5 : 4
Let A = 5x and B = 4x.
Then A + B = 9x.
Total Work = 100.
A's Share = (5/9) × 100 = 55.56%.