radomes.openskiesproject.org
rubayabashar rubayabashar
  • 10-03-2014
  • Mathematics
Answered

a rectangle has an area of 30 square meter and a perimeter of 34 meters. what are the dimensions of rectangle?

Verified Answer :

iloveonedirection
iloveonedirection iloveonedirection
  • 25-07-2014

\(A=lw\)
\(P=2l+2w\)

\(30=lw\)
\(34=2l+2w\)

\(30=lw\) --> \(w= \frac{30}{l}\)

\(34=2l+2( \frac{30}{l}) \\ 34=2l+ \frac{60}{l} \\ 34l=2l^2+60 \\ 2l^2-34l+60=0 \\ 2(l-2)(l-15)=0 \\ l=2, 15\)

\(30=(2)w\)
\(15=w\)

\(30=(15)w\)
\(2=w\)

The dimensions can either be 15 x 2 or 2 x 15.

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