Posted by bev on Monday, May 3, 2010 at 12:30am.
P=2l+2w
270=2(w+25)+2w
270=2w+50+2w
220=4w
55=w
so
l=w+25
=55+25
=80
Check
P=2l+2w
270=2(80)+2(55)
270=160+110
270=270
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