Read the passage below and solve the questions based on it.
There are three taps A,B, C and an outlet pipe D. A, B and C can fill the tank in the Panikam locality in 10, 20 and 25 h respectively. The outlet pipe can empty the same tank in 100 h. There are 2,000 houses in the locality. The tank has a capacity of 50,000 litres.
If all the taps and the outlet pipe are opened simul-taneously, how much water is thrown into the tank every hour?