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:

Two pipes can fill a tank in 20 and 24 minutes respectively and a wast

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:
Answer» 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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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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