A alone can complete a work in 6 days and B alone can complete the same work in 8 days. In how many days both A and B together can complete the same work?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 24/7 days
Let the total work be LCM of 6 and 8 = 24 unit
Total time = Total work/Efficiency
Efficiency of A = 24/6 = 4
Efficiency of B = 24/8 = 3
Efficiency of A + B = 7
By working together A and B will take 24/7 days.