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A small plane is flying a banner in the shape of a rectangle. The area of the banner is 144 square feet. The width is one four the length of the banner. What are the dimensions of the banner

Sagot :

We know that area of rectangle its equail A=l*w.
We know that length is 4 times greater than width, so we can say
l=4x and w=x
Knowing that area A=144 we can say
4x*x=144
[tex]4x^2=144 \\ x^2=36 \\ x=6[/tex] -
w=6 - its the width
l=6*4=24 - its the length