Sonal and Arjun together can finish a piece of work in 57 days, Arjun and Rohan in 38 days, and Rohan and Sonal in 38 days, then Sonal, Arjun, and Rohan together can finish the same work in how many days?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 28.5 days
Sonal and Arjun together can finish a piece of work in 57 days
Arjun and Rohan together can finish a piece of work in 38 days
Rohan and Sonal together can finish a piece of work in 38 days
Total work = 114 days
The combined efficiency of Sonal, Arjun, and Rohan = 8/2 = 4
Hence, Sonal, Arjun, and Rohan together can finish the same work in = 114/4 = 28.5 days