Mohan takes 9 hours to mow a large lawn. He and Sohan together can mow in4 hours. How long will Sohan take to mow the lawn if he works alone?

Given,


Mohan can mow a lawn in 9 hours.


Work done by Mohan in 1 hour =


Mohan and Sohan can mow it together in = 4 hours


Work done by them together in 1 hour =


Work done by Sohan in 1 hour = (work done by both in 1 hour) – (work done by Mohan in 1 hr)



Time taken by Sohan to complete the work =


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