Answer:
It will take you 24 minutes to paint the wall with dimensions 8 ft x 5 ft.
Explanation:
The total area of the wall is:
8 ft x 5 ft = 40 square feet
To paint 75 square feet takes 45 minutes, so to paint 1 square foot takes:
45 minutes ÷ 75 square feet = 0.6 minutes/square foot
Therefore, to paint 40 square feet will take:
40 square feet x 0.6 minutes/square foot = 24 minutes