The length of a rectangle is twice the width of it. If perimeter of the rectangle is 42 m, find the area of the rectangle.
Let the breadth of rectangle be x.
Given, Length = 2x
Perimeter =2(length+breadth)
⇒ 2(x+2x)=42m
⇒3x=422m
On solving, we get x = 7 m
Breadth = x= 7 m
Length = 2x = 14m
Area =length×breadth
=14 m×7 m
=98 m2