Mathematics
21odunayo
1

area of room is 320 and width is 4/5 of length

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(1) Answers
Melani399

Area is w*l and [latex]w=\frac{4l}5[/latex], thus the area is [latex]\frac{4l^2}5[/latex]. Make it equal to 320 and you get [latex]l^2=400[/latex], thus [latex]l=\pm{20}[/latex], the minus one not being meaningful in our context. Thus the length is 20, while the width is 16.

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