Sunday, May 26, 2013

Find the dimensions of a rectangle whose area is 216 cm2 and whose perimeter is 60 cm


l%2Aw=216 



2%28l%2Bw%29=60 therefore l%2Bw=30 

l%2830-l%29=216 

l%5E2-30%2Al%2B216=0 

l=12 or l=18 

so l=12 and w=18 


:)
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