A cistern has one inlet, L and one inlet, M. L takes 5 hours to fill the empty tank, when M is not open and M takes 8 hours to empty the full tank, if the tank is two fifth full, how much time will it take to fill the tank completely when both L and M are opened simultaneously? (in hours)
A) 5 hours B) 3 hours C) 6 hours D) 8 hours
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3 hours
time will it take to fill the tank when both London and Mr are opened simultaneously.
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