Answer:
25.2 minutes
Step-by-step explanation:
step 1
Find the area of the given wall
[tex]A=(7)(6)=42\ ft^2[/tex]
step 2
we know that
You can paint 75 square feet of a surface every 45 minutes
so
using proportion
Find out how long it takes you to paint a surface area of 42 square feet
[tex]\frac{75}{45}\ \frac{ft^2}{min}=\frac{42}{x}\ \frac{ft^2}{min}\\\\x=45(42)/75\\\\x=25.2\ min[/tex]
