প্রশ্ন সংশোধন করুন
প্রশ্ন:
A pump can fill a tank with water in 2 hours . Because of a leak , it took hours to fill the tank.The leak can drain all the water of the tank in -
A pump can fill a tank with water in 2 hours . Because of a leak , it took hours to fill the tank.The leak can drain all the water of the tank in -