Question

A hallway has an area of 63 square feet. the length of the hallway is 7 times longer than the width. what is the width of the hallway?

Answer 1

The area is given by:
A = (w) * (l)
Where,
w: width
l: length
Substituting values we have:
63 = (w) * (7w)
Clearing w we have:
w ^ 2 = 63/7
w = root (9)
w = 3 feet
Answer:
the width of the hallway is:
w = 3 feet