The equation for area is l (length) * w (width). So, to find the length, we just have to divide the area by the width.
The equation to find the length will look something like this: area/width = length. Or in this case: 54/6 = 9, where 54 is the area, 6 is the width, and 9 is the length.
So the length of Mr. White’s pool is 9 yards long.