1.4688 gallons in each 12 inches.
146.9 gallons of water.
Assuming the 6" refers to the radius of the pipe, it will hold approx 294 US gallons.
The capacity of that section of pipe is 73.44 gallons. (rounded) We have no way of knowing how much water is in it. For all we know, it may be completely empty.
2
U tell me
About 5869.24 gallons
A pipe this size holds 1,642 (1,642.12358) US gallons.
499.39 gallons per 340 feet.
3.9
Oh, dude, you're hitting me with the pipe questions now? Alright, so a 6-inch pipe with a length of 10 feet would hold approximately 7.4 gallons of water. But like, who's measuring water in pipes these days anyway?
1 and 1/2 gallons
A pipe does no water. Te capacity of the pipe with the given dimensions is approximately 98.2 US gallons. Whether or not the pipe holds any water is impossible to say.