need sum help

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need sum help

Postby aydz » Thu Dec 27, 2007 8:33 pm

can you help me with this 1km of pipe with 48 inches circum. what is the volume in cubic meter

Re: need sum help

Postby Guest » Thu Dec 27, 2007 9:50 pm

aydz wrote:can you help me with this 1km of pipe with 48 inches circum. what is the volume in cubic meter

Well, if you want the answer is m^3, it helps to measure everything in meters.

1) 1 km = 1000 m

2) 48" *.0254 m/in = 1.2192 m.

3) Is that inside or outside circumference? You really need the inside diameter c = pi* d
diameter using above figure is 0.388 m

4) Volume of cylinder is V = (pi/4)*d*d*h = 118.3 m^3

If this is a real problem, and not homework, measure the inside diameter and correct step (3), then (4)

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