عندي خزان يوجد فيه ثلاث حنفيات الاول يتعبى في ساعه وثاني في نص ساعه وثالث في ريع ساعه كم نستغرق من الوقت لملى الخزان

Three hoses fill a tank in 1 hour, with the first hose taking 60 minutes, the second hose taking 30 minutes, and the third hose taking 15 minutes. If they all work together for 1 hour, the first hose fills 1 tank per hour, the second hose fills 2 tanks per hour, and the third hose fills 4 tanks per hour. Therefore, they will fill 7 tanks in one hour. This means that it will take approximately 8.57 minutes to fill each tank.