<PRE><B>Question 1087680</B>
An irrigation pipe 6 in. in diameter has water flowing at the rate of 8 ft. per minute.  Determine amount (gal.) delivered per hr. at the end of the pipe.
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If 6 in is the ID:
Cross-sectional area (CSA) = pi*r^2 = 9pi sq inches.
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8 ft/min = 96 in/min
Flow rate = CSA*96 = 864pi cubic inches/minute = 0.5pi cubic ft/minute
= 30pi cubic ft/hr
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Convert to gallons/hr
I think it&#39;s 7.48 gal/cf
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Flow rate = 7.48*30pi gal/hr
= ~ 704.97 gal/hr
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