<PRE><B>Question 415474</B>
recently i was given the formula for volume of a pipe .785 x diameter x length where .785 is pi/4 could you please explain how you simplify the formula to get .785 x diameter x length for volume of a pipe i understand .785 is 1/4 pii but i dont understand how you get from piiR^2 x length to .785 X dia. x length for the volume and ive worked both ways the only one close is .785 formula
-------
Volume = Area of a cross section *length
---
But Surface = Circumference * length
S = pi*D*L
------
0.785*diameter*length looks like a surface formula to me.
-----
Cheers,
Stan H.
========</PRE>