Answer:
16 feet in length.
Step-by-step explanation:
In this situation, you are given the area and the width of the full carpet, furthermore, you must reverse the formula for area to find the length, as so:
Area Formula: A= l • w
Given: 136= l • 8.5
l = 136 ÷ 8.5
l = 16 feet
I hope this was helpful!
