Question

solve this question pls​

Answer 1

Answer:

Step-by-step explanation:

L ⇒ 40

P ⇒ 120

B ⇒ !

Perimeter ⇒ 2(L + B)

          120 ⇒2(40 + B)

           ⇒120/2 = 40 + B

           ⇒60 - 40 = B

           ⇒20 = B

                   or

B ⇒ 20

Please mark me as the brainliest answer

Answer 2

Answer:

breadth of the rectangle = 20cm

The area of the Rectangle = 800cm²

Step-by-step explanation:

Let the breadth of the rectangle (b) = x

and length of the rectangle (l) = 40cm

The perimeter of the rectangle = 2(l+b)

120 = 2(40+x)

120 = 80 + 2x

120 – 80 = 2x

40 = 2x

40/2 = x

20 = x

or x = 20cm

The area of the rectangle = l × b

= 40 × 20

= 800cm²

I hope it is helpful