Problema Solution
If the width of a rectangle is three feet less than the length and the area is 108 square feet, find the length of the rectangle.
Answer provided by our tutors
Let
x = the length, x>=0
x - 3 = the width
A = 108 ft^2 the area
The formula for area of rectangle is:
A = width*length
A = (x - 3)x
Now we can write the the equation:
(x - 3)x = 108
........
click here to see the equation solved for x
........
x = 12 ft
We need to ignore the negative solution -9 since the length can not be negative.
The length of the rectangle is 12 feet.