Question

a square of side 60m and rectangle of lenth 80m have same perimeter. find their area

Answer 1

perimeter of square = 4*60 => 240 m2
therefore breadth => 2 (80+b)= 240
=> 160+ 2b => 240
=> b => 240-160/2 => 80/2 => 40m
so the area of the square => 60*60=> 3600m2
and area of the rectangle => 80*40=> 3200m2

Answer 2

lets find perimeter of square=4*side
                                             =60*4
                                              =240m²
A square of side 60m and rectangle of lenth 80m have same perimeter
so 240= 2(l+b)
     240 =2(80 +b)
b=40
area of sqaure=side*side
                        =60*60
                        =3600m
area of rectangle=l*b
                          =80*40
                                   =3200m²
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