Answer:
7.2 inches
Step-by-step explanation:
Roof Pitch
Roof pitch (or slope) measures how many inches the roof rises for every 12 inches in depth.
Example: a roof pitch is “6/12 pitch” if the roof rises 6 inches for every 12 inches inward towards the peak (or ridge).
The drawing of the roof provided in the question tells us the roof rises 9 ft for every 15 ft in depth. The ratio is 9/15 height over depth.
If we wanted to know the roof pitch as defined, we just have to find the equivalent rise for every 12 inches:
12*9/15=7.2 inches
It means the roof rises 7.2 inches for every 12 inches it has in depth
