One cu ft = 12 X 12 X 12 cubic inches or 1728 cubic inches. If i.d. of tube
is 4 inches, area is 2 X 2 X PI = 12.57 sq inches. Total volume for 40 ft
length is 12.57 X 12 X 40 = 6031.85 cubic inches. Divided by 1728 = 3.49
cubic feet.
73,
Gerald K5GW
In a message dated 2/5/2011 8:14:00 P.M. Central Standard Time,
Brahmangou@aol.com writes:
The volume is 13.75 cubic feet for each 40' pipe section.
de AB5GU
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