A gallon is a measure of volume which needs three dimensions to describe. You have given only two in the question so the question cannot be answered.
1,269,551.02 US gallons.
A 12 inch diameter round pipe will hold 4.89 UK gallons or 5.88 US gallons per foot.
Over 9,000.
This pipe can hold up to 0.5 cubic foot or 3.7 gallons of water.
146.9 gallons of water.
This pipe will hold 23,500.7 gallons of water.
The pipe can hold up to 6,762.39 US gallons of water.
This pipe will hold 1,468.8 gallons of water.
It depends on how wide the pipe is.
Volume of the pipe = 4.896 gallons
0.1912 gallons.
It depends on how much each pipe can hold. And how long each pipe is.
1,269,551.02 US gallons.
0.255 gallons per foot of pipe. A 10 ft long pipe that size holds 2.55 gallons.
Assuming the 6" refers to the radius of the pipe, it will hold approx 294 US gallons.
much water per foot will a 5 inch pipe hold
About 235 gallons of water.