SOLUTION: A rectangle flower garden, 7m by 6 m, is surrounded by a grass strip of uniform width. If the total area of the garden and the grass strip is 90m, what is the width of the strip?

Question 110788: A rectangle flower garden, 7m by 6 m, is surrounded by a grass strip of uniform width. If the total area of the garden and the grass strip is 90m, what is the width of the strip?
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
A rectangle flower garden, 7m by 6 m, is surrounded by a grass strip of uniform width. If the total area of the garden and the grass strip is 90m, what is the width of the strip?
Given:

Then:
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Solve for using quadratic formula:

We need only positive root:

Check:

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