SOLUTION: A mural is to be painted on the wall that is 15m long and 12m high. A border of uniform width is to surround the mural. If the mural is to have an area of 135m^2, how wide must the

Question 1181262: A mural is to be painted on the wall that is 15m long and 12m high. A border of uniform width is to surround the mural. If the mural is to have an area of 135m^2, how wide must the border be to completely cover the wall?
Thanks
Answer by ikleyn(52797) (Show Source): You can put this solution on YOUR website!
.


Let w be the uniform width of the border.


Then you have this area equation to find "w"


    (15-2w)*(12-2w) = 135   square meters.


Simplify; reduce to the standard quadratic equation and solve using the quadratic formula.

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