SOLUTION: an iron pipe 10 ft. long has an internal diameter of 1 ft. if the iron is 1/2 in. thick, find the volume of metal in the pipe.

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Question 977394: an iron pipe 10 ft. long has an internal diameter of 1 ft. if the iron is 1/2 in. thick, find the volume of metal in the pipe.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Outside diameter is 12+%2B+1%2F2+%2B+1%2F2=13inches
The volume of the pipe (converting all units to inches),
V=%28pi%2F4%29%2A%28D%5Bo%5D%5E2-D%5Bi%5D%5E2%29%2AL
V=%28pi%2F4%29%2A%2813%5E2-12%5E2%29%2812%2A10%29
V=%28pi%2F4%29%2A%28169-144%29%28120%29
V=%28pi%2F4%29%2A%2825%29%28120%29
V=750piin%5E3