A water tanker can completely fill the Cooperative Housing Society’s tank in 45minutes. The outlet pipe that runs from the CHS tank to all the houses will empty the tank in 60 minutes. On a typical day, at 5 am in the morning, when the tank was half full, the outlet pipe was opened. The refill water tanker arrived and started fi lling thetank at 5:25 am. At what time will the tank be completely full?(1) 7:15 am (2) 6:55 am(3) 8:10 am (4) 7:10 am

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