That all depends on how long said 3" pipe is?
Same as an 3" - 8 " pipe
The volume of the pipe is 0.2078 gallon per foot of length.I have no idea how much water might be in it.
There need not be any water in the pipe! The volume of the pipe is 1044 Imperial gallons
55 to 60
depends on the pressure pushing through the pipe
Depends on the diameter of the pipe and the speed at which the water travels through it.
Yes, but only pipe, fittings too big in diameter where they glue together to fit in 2X4 wall.
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.
It depends on how much each pipe can hold. And how long each pipe is.
how many gallons of water are in 200 feet of 1 1/4 pipe
Well if you reduce the area of the pipe at the end, or anywhere else on the pipe for that matter, you are restricting the flow and it will be reduced. How much reduction depends partly on the water pressure available
It depends on the cross sectional area of the pipe.