Given that the contaminated region is a square, the area is given by the formula: Area=length*width since in a square length=width the area=length×length or area=width×width
thus given that area=4m^4/144n^4 sq. units let the width be w units thus area=w×w=4m^4/144n^4 w²=4m^4/144n^4 solving for w we get: w=√(4m^4/144n^4 ) w=2m²/12n² Hence the width,w=2m²/12n²
