Question 132319
THE ORIGINAL FACTORY HAS A PERIMETER=2*80+2*60=160+120=280 CM.
THE WIDTH OF THE SIDEWALK IS NOT KNOWN/GIVEN FOR THE ORIGINAL FACTORY.
THE EXPANDED MEASUREMENTS OF THE FACTORY ARE 2*160+2*120=320+240=560 CM. 
THEREFORE THERE IS NO WAY OF CALCULATING THE WIDTH, ONLY THE EXPANDED LENGTH OF THE SIDEWALK.