Question

The perimeter of a rectangle is 72 cm. The length is 3 times the width. Find the area of the rectangle.
PLEASE SOLVE STEP BY STEP AND THEN SUBMIT ​

Answer 1

Answer:

given 3b = l

perimeter = 2(l+b)

72 = 2(3b+b)

36 = 4b

b = 9 cm

l = 3b

l = 27cm

area = l×b

= 27×9

= 243 cm²

Answer 2

Step-by-step explanation:

perimeter of rectangle = 72cm = 2(l+w)

let's consider width as x

width=x

length=3x

using formula

2(3x+x) = 72

2(4x) = 72

8x=72

x = 72/8

x = 9

then width=9

length = (9×3) = 27

Now we know the values

area of rectangle = l×w

9×27

=243