Jason can do a piece of work alone in 23.4 days, while Rafique can do the same piece of work alone in 39 days. In how many days can the duo complete the same work if they work together?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 14.625.
Let the total work = 23.4 × 39 = 912.6
Efficiency of Jason and Rafique = (912.6/23.4) + (912.6/39) = 39 + 23.4 = 62.4
Number of days to complete work = 912.6/62.4 = 14.625 days