Question

the perimeter of rectangle is 72 CM the length is three times the with find the area of the rectangle

Answer 1

2(length) +2(width)=perimeter
2(3(width))+2(width)=72
8×width=72
width=9
length=3×9=27
area=27×9
247=area

Answer 2

Let the width be x

Length is 3x

Perimeter of rectangle=2(l+b)

72 =2(x+3x)

72=2×4x

36=4x

9=x

So length is 3×9=27

Area of rectangle=l×b=9×27=243cm