Question

the perimeter of a rectangle is 72cm.the length is 3 time the width. find the area of the rectangle​

Answer 1

Answer:

width=x [let]

lenght= 3x

According to question,

2* (x + 3x)= 72 cm

{perimeter=2*(l+b)}

so,

2*4x=72

8x=72

x=72/8

x=9

Answer 2

Answer:

Let ,the width be x,

and length be 3x.

=Perimeter=2(l+b)

= 72 =2(3x + x)

= 72 =2(4x)

= 72 = 8x

= x=72/8

= 9

=Width=9

=Length=3x

=27

=Area of the rectangle=(l×b)

=27×9

=243