SOLUTION: The height of a {{{highlight(cross(rectangle))}}} <U>rectangular</U> {{{highlight(window)}}} is 0.4 m more than the width. The total area is 10.4 m2. Determine the dimensions of

Question 1195545: The height of a rectangular is 0.4 m more than the width. The total area is 10.4 m2.
Determine the dimensions of the window by solving an appropriate equation. Round your answer to the nearest hundredth
Answer by ikleyn(52915) (Show Source): You can put this solution on YOUR website!
.


W*(W+0.4) = 10.4


W^2 + 0.4W - 10.4 = 0


Solve this quadratic equation using the quadratic formula.


ANSWER.  The width W is 3.03 m;  The height is  3.03+0.4 = 3.43 m.


CHECK.  3.03*3.43 = 10.394 m^2,  which is good, taking rounding into account.

Solved.

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On solving quadratic equations using the quadratic formula, see the lessons
    - Introduction into Quadratic Equations
    - PROOF of quadratic formula by completing the square
in this site.

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    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this textbook under the topic "Quadratic equations".

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Free of charge online textbook in ALGEBRA-I
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to your archive and use it when it is needed.

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