SOLUTION: My teacher is building a garden in her backyard. She has 90 ft of fencing to surround it. If she wants the length to be 15 ft longer than the width, what will the dimensions of the

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> SOLUTION: My teacher is building a garden in her backyard. She has 90 ft of fencing to surround it. If she wants the length to be 15 ft longer than the width, what will the dimensions of the      Log On

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Question 617637: My teacher is building a garden in her backyard. She has 90 ft of fencing to surround it. If she wants the length to be 15 ft longer than the width, what will the dimensions of the garden be?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let the width = +w+
The length is +w+%2B+15+
The formula for perimeter is:
+P+=+2w+%2B+2%2A%28+w+%2B+15+%29+
+P+=+90+
+90+=+2w+%2B+2w+%2B+30+
+4w+=+90+-+30+
+4w+=+60+
+w+=+15+
+w+%2B+15+=+30+
The dimensions are 15' x 30'
check:
+P+=+2w+%2B+2%2A%28+w+%2B+15+%29+
+P+=+2%2A15+%2B+2%2A%28+15+%2B+15+%29+
+P+=+30+%2B+60+
+P+=+90+
OK