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1. Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is:





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  • By: guest on 01 Jun 2017 05.47 pm
    Work done by the waste pipe in 1 minute = 1 - 1 + 1 15 20 24     = 1 - 11 15 120     = -  1 .    [-ve sign means emptying] 40 Volume of 1 part = 3 gallons. 40 Volume of whole = (3 x 40) gallons = 120 gallons.
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