Question

# Marianna is painting a ramp for the school play that is in the shape of a right triangular prism. The ramp has the dimensions shown. She will not pain

Factors and multiples
Marianna is painting a ramp for the school play that is in the shape of a right triangular prism. The ramp has the dimensions shown. She will not pain the back or bottom surfaces of the ramp.
Each can of paint covers 1,000 square inches. What is the fewest number of full cans of paint Marianna will need? Circle the minimum number of cans.

The triangular faces have dimensions of 14 inches by 48 inches so each one has an area of $$\displaystyle{\frac{{{1}}}{{{2}}}}{\left({48}\right)}{\left({14}\right)}={24}{\left({14}\right)}={336}$$ square inches.
Since each can covers 1,000 square inches and $$\displaystyle{\frac{{{3647}}}{{{1000}}}}={3.647}$$, then she will need 4 full cans of paint to have enough paint.