One gallon of paint (volume = 3.78 10-3 m3) covers an area of 20.0 m2. What is the thickness of the fresh paint on the wall?

Question

One gallon of paint (volume = 3.78  10-3 m3) covers an area of 20.0 m2. What is the thickness of the fresh paint on the wall?

anonymous · Answer

Well... just try thinking of it as a cuboid of paint with the volume 3.78 dm³ and a "base area" (don't know if that's the right term in english) of 20m²...

anonymous · Answer

You have a volume (gallon = 3.78x10^-3m^3) and another volume of which you only now is the area (20.0m^2) so:

anonymous · Answer

$$3.78x10^{-3} m^{3}=10m.2m.(X)m$$10m times 2m is 20m^2, solve for X and obtain the thickness of the coat.

anonymous · Answer

would it be 1.89 x 10^-4?

anonymous · Answer

im not entirely sure how to answer it

anonymous · Answer

thats what i got

anonymous · Answer

$$3.78x10^{-3} m^{3}/20m^{2}=Xm$$same as$$0.00378cubic-meters/20squar-meters=Xmeters$$same as$$0.00378/20=X$$

anonymous · Answer

Yep, 1.89x10^-4 = 0.000189meters

anonymous · Answer

yay!!! thank you so much!!!