- #1

synergix

- 178

- 0

## Homework Statement

Use differentials to estimate the amount of paint needed to apply a coat of paint 0.05cm thick to a hemispherical dome with diameter 50m

## Homework Equations

A= 2(pi)r

^{2}

## The Attempt at a Solution

dr=0.0005 m

r=25m

dA=?

(A=2(pi)r

^{2})'

dA= 4(pi)r*dr

I won't go any further because the number is very small and i think incorrect.

I am pretty sure I'm missing a step but I can't figure out what or why.

Then again I could be way off.