how do I figure volumm (cu ft) in a cylintrical object, ie pipe, water heater?

Answer 1

Area of base times height:

1. Obtain radius of object: Either divide diameter (width of footprint of heater, width of pipe) in half, or take circumference of said object, and divide by 2pi.

r = d/2
r = C/(2*pi)

2. Take that radius, square it, and multiply by pi to get area

A = R^2*pi

Multiply it by the height of the heater or the length of the pipe:

Volume = A(base)*H = R^2*pi*H

Answer 2

If you can't calculate it, fill the object (pipe, H2O heater) with water, drain it and measure the amount of water exuded.

Answer 3

Volume of a cylinder = Area of circular base x height of cylinder

Cylinder volume = (3.14159 x radius of circular base x height)

radius of pipe and height must be in same units, in, ft, cm, etc
and volume will be in cubic in, ft, cm, etc.

Answer 4

the volume of a cylinder = (pi)(d^2)/4 x length where d = diameter

Answer 5

v = pi*R^2*h
pi = 3.14159....
R = radius (R^2 = R*R)
h = height

Answer 6

antiderivatives