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A rectangular flower garden with dimensions 3m by 7m is surrounded by the walk of uniform width. If the are of the walk is 11 sq. m, what is the width in meters?

Mathematics
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(7+2x)(3 +2x)-11=21---> 4x^2+20x-11=0----> now solve this using the quad. equation. x=-5.5 and x=.5 The value can only be positive therefore the width can only be x=.5 So the width around the garden is 1/2 m or .5m. Whichever method your prefer.
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