A is 50% more efficient then B. B worked to finish the same work in 20 days. If A and B worked together, then how much time will they take to finish the same work?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 8 days.
According to the question,
Ratio of efficiency of A : B = 3 : 2
Total work = 2 × 20 = 40 units
Total work units done by A and B together in one day = 3 + 2 = 5 units
So, time taken by A and B to complete the work = 40/5
⇒ 8 days