A completes a piece of work in 4 days and B completes it in 6 days. How long will it take to complete the same piece of work if they both work together?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. days.
Total work = LCM of 4 and 6 = 12
Efficiency of A and B = 12/4 + 12/6 = 3 + 2 = 5
Total time required = 12/5 = days