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Two pipes together can fill a cistern in 36 hours. If another draining pipe attached to the tank, it takes 9 hours longer to fill the tank. Find in how much time can the drain pipe alone can empty a half full tank.1). 180 hours2). 90 hours3). 315 hours4). Can’t be determined |
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Answer»
C drains out one UNIT of water in one hour Capacity of the tank = 180 Half the capacity of the tank = 90 ∴ TIME required to EMPTY the half-filled tank = 90/1 = 90 hours |
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