July 2015
Problem of the Month
Pipe Problem
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Problem of the Month
Two input pipes will be used to fill an empty 68-gallon tank.
One pipe delivers at a rate of 4 gallons in one minute and the other pipe delivers at a rate of 1 gallon every 4 minutes.
How long will it take them to fill the tank?
Solution to the Problem:
The answer is 16 minutes.
Every minute, the two pipes together deliver 4.25 gallons. They will deliver all 68 gallons in 68 / 4.25 = 16 minutes.
Correctly solved by:
1. James Alarie
Flint, Michigan
2. Timothy Winkler
San Marcos, Texas
3. Aisling Lauder
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4. Sem Karaman
San Francisco, California
5. Michael Reilly
Silver Spring, Maryland
Send any comments or questions to:
David Pleacher