Question

One gallon of paint (volume = 3.78 10-3 m3) covers an area of 16.0 m2. What is the thickness of the fresh paint on the wall?

Answer 1

If we assume that the layer of paint has equal thickness everywhere on its surface, we can write that the volume is thickness times area:

$$V=TA,\\T=\frac{V}{A}=\frac{3.78\cdot10^{-3}}{16}=2.36\cdot10^{-4}\text{ m},$$

or 0.24 mm.