Question 190555
A picture frame is 14cm by 18cm. There are 192cm2 of the picture showing. Find the width of the frame. I have 2cm.
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Draw a rectangle inside a rectangle.
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Let the uniform frame width be "x".
(18-2x)(14-2x) = 192
252-28x-36x+4x^2 = 192
4x^2-64x+60 = 0
x^2-16x+15) = 0
(x-15)(x-1)=0
Realistic solution:
x = 1 cm
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Cheers,
Stan H.