Correct option is B
Given:
Ravi and Sanju together can complete the job in 2 days.
Sanju and Mahesh together can complete the job in 4 days.
Ravi and Mahesh together can complete the job in 2 days.
Formula Used:
Total Work = Efficiency Total Time
Solution:
LCM (2, 4, 2) = 4

2 (Ravi + Sanju + Mahesh) = 5
Efficiency of (Ravi + Sanju + Mahesh) =
So, Ravi = 1.5, Sanju = 0.5 , Mahesh = 0.5
The time required for Ravi to complete the job alone = days
Thus, the correct option is (b)