A machine can filled a tank in 25 minutes and another machine can empty it in 50 minutes. If the tank is already half full and both the taps are opened together, then the tank is filled in how many minutes?
Choose the correct choice from the following:
A) 25min B) 20min C) 10min D) 15min E) 30min
T = 1/2 (25*50 / 50-25) = 25 minutes   Tank is filled in 25 minutes   25minnswer is 25min
<result>A</result>
A machine can filled a tank in 25 minutes and another machine can empty it in 50 minutes. If the tank is already half full and both the taps are opened together, then the tank is filled in how many minutes?