pipe volume to gallons urgent

need this calculation how many imp gallons of water does 3000ft of 1.25in pipe hold, inside measurment 1.25 in and it is 3000ft long thanks

need this calculation how many imp gallons of water does 3000ft of 1.25in pipe hold, inside measurment 1.25 in and it is 3000ft long thanks

1 Imp. gallon = 4.54609 L, so this will be easier to do in metric. (US gallon is 231 in^3, so I might do it in inches).

Volume of a cylinder = (pi/4)*d*d*l
Converting the dimensions to meters as I enter,
(pi/4) x 0.03175 m x 0.03175 m x 914.4 m = 0.72396 m^3 = 723.96 L = 159.25 Imp gallons.

so the total capacity of 3000 ft of 1 1/4 inch pipe in gallons would be 159 imp gallons thanks

need this calculation how many imp gallons of water does 3000ft of 1.25in pipe hold, inside measurment 1.25 in and it is 3000ft long thanks

How many gallons of water in1250 feet of 12" pipe.how many gallons of water in 1250ft.of 12inch pipe.