Question

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

Answer 1

Answer:

243cm²

Step-by-step explanation:

let width =x

so length=3×x=3x

According to Question

72=2(l+b)

72=2(x+3x)

72=2x+6x

72=8x

72÷8=x

9=x

so width is 9

length is 3×9=27

area of rectangl=l×b

9×27=243

Answer 2

Answer:

243cm² is the area of rectangle

perimeter --- 2(l+b) = 72

width = x ♥♥♥♥♥♥♥ length = 3x

2(x+3x) = 72

2(4x) = 72

8x = 72 ( transposing )

x = 9

length= 9

width 9×3 = 27

area = 9×27 = 243m