Ram and Shawan working together can complete a job in 5 hours, where as Ram alone can complete the same job in 6 hours. In how many hours can Shawan alone complete the job?

30

Ram + Shawan = 5 hrs,

Ram = 6 hrs,

⇒ Therefore Shawan in a day = 1 (Efficiency)

⇒ Time required by Shawan to complete the total work alone = \(\frac{30}{1}\) = 30 hrs.        ..(\(\frac{Work}{Efficiency}\) = Time)