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An inlet pipe can fill a large water tank in 5 hours An outlet pipe can empty the same water tank in 8 hours Given an empty water tank at 6PM activate both pipes Question What time on?
Wiki User
∙ 14y ago
The inlet pipe fills 1/5 of the tank per hour.
The outlet pipe empties 1/8 of the tank per hour.
While inletting and outletting simultaneously, (1/5 - 1/8) = (8/40 - 5/40) = 3/40 of the tank fills per hour.
Under those conditions, the tank fills in 40/3 = [ 13 and 1/3rd ] hours.
Given an empty tank and activating both pipes at 6 PM, the tank is full at 7:20 AM the next morning.
Wiki User
∙ 14y ago
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