Answer to Question #273215 in Geometry for Tee

Question #273215

The width of rectangle is 25% shorter than the length. If the perimeter is 21. Find the are of the rectangle

Expert's answer

"P=2l+2w=21."

"w=(1-0.25)l."

"2l+2(1-0.25)l=21."

"2l+1.5l=21."

"l=\\frac{21}{3.5}=6."

"w=0.75l=6*0.75=4.5."

"A=lw=6*4.5=27."

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