SOLUTION: The height of a garage door measures four feet less than the door’s width. The area of the garage door is 165 square feet. Determine the height and width of the garage door.

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Question 1182007: The height of a garage door measures four feet less than the door’s width. The area of the garage door is 165 square feet. Determine the height and width of the garage door.
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
y height
x width
Answer by ikleyn(52780)   (Show Source): You can put this solution on YOUR website!
.

The answer is 11 ft for the width and 15 ft for the height.



It can be easily guessed MENTALLY, or obtained from the solution 

of this quadratic equation


    x*(x-4) = 165,


where x is the width of the garage door.

Solved.



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