About how accurately must be the exterior diameter of a 10 meters high cylindrical storage tank measured to calculate the amount of paint it will take to paint the side of the tank to within %5 of it's true value?

Please explain thoroughly I have a test soon!

Question

About how accurately must be the exterior diameter of a 10 meters high cylindrical storage tank measured to calculate the amount of paint it will take to paint the side of the tank to within %5 of it's true value? 

Please explain thoroughly I have a test soon!

anonymous · Answer

im not sure about this one ...

whpalmer4 · Answer

not sure why you closed the other question where I was trying to help you...

we want the surface area just of the side of the cylinder, not the the ends, because the question says "paint the side of the tank", right?  what is the formula for the area of the side of the cylinder?

whpalmer4 · Answer

the area of the side of the cylinder depends on two factors, the height, and the radius (or diameter), right?  it's just a rectangle rolled up so two edges meet...

whpalmer4 · Answer

one side of the rectangle has the same length as the height of the cylinder.  the other side has the same length as the circumference of the cylinder, right?

anonymous · Answer

is it pi(R^2)(h)

whpalmer4 · Answer

@cvlibol no, that is the volume.  think about the units you get with that formula:

$$\pi * ([length])^2 * [length] = \pi* [length]^3$$