The question is the width of the layer of paint before it dries.
You can use the formula for the volumen, V = area * width => width = V / area
Where V = 1 liter = 1 m^3 /1000 = 10^ -3 m^3 and area = 10m^2
Then the width of the layer will be: width = [10^ - 3 m^3 ] / [10m^2] = 10^-5 m
Now convert to mm : 1 m = 10^3 mm
=> 10^-5m * 10^3 mm/m = 10^-2mm = 0.01mm
Answer: 0.01 mm
