Mohan can complete a job in 8 days working 9 hourse a day. Sohan can complte it in I daays wrorking 10 hours a day. In how many days can Mohan and Sohan together complete it working 8 hours a day ?

Options

A. 6
B. 4
C. 3
D. 5

Answer

D

Explanation

Time in which Mohan can complete the job `=(8)(9)` hours =72 hours
Time in which Sohan can complete it `=(9)(10)` hours =20 horus.
Time in which Mohan can complete it `=((72)(90))/(72+90)` days =5 days
Number of days in which they can complete it `40=(40)/(8)` days. =5 days