A large tank of height 10 m is fitted with an inlet pipe which can fill the tank in 60 minutes. The tank has three emptying outlets pipes fitted at the heights of 5 m, & m and 9.5 m respectively from the bottom. All the pipes are opened simultaneously with the tank being empty initially. In how much time (in minutes) will 95% of the tank be filled, if the lowest outlet pipe alone can empty half the tank in one and a half hour, the outlet pipe in the middle alone can empty 20% of the tank in 1 hour 12 minutes and the outlet pipe at the top alone can empty 5% of the tank in 18 minutes?