A cistern has one inlet, L and one inlet, M. L takes 5 hours to fill theÂ empty tank,Â when M is not open and M takes 8 hours to empty the full tank, if the tank is two fifthÂ full, how much time will it take to fill the tank completely when both L and M areÂ opened simultaneously? (in hours)

A cistern has one inlet, L and one inlet, M. L takes 5 hours to fill t

1.	A cistern has one inlet, L and one inlet, M. L takes 5 hours to fill theÂ empty tank,Â when M is not open and M takes 8 hours to empty the full tank, if the tank is two fifthÂ full, how much time will it take to fill the tank completely when both L and M areÂ opened simultaneously? (in hours)
A.	5 hours
B.	3 hours
C.	6 hours
D.	8 hours
Answer» E.

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A cistern has one inlet, L and one inlet, M. L takes 5 hours to fill theÂ empty tank,Â when M is not open and M takes 8 hours to empty the full tank, if the tank is two fifthÂ full, how much time will it take to fill the tank completely when both L and M areÂ opened simultaneously? (in hours)

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