Question

Perimeter of a rectangle is 120cm and its length is 40cm. find the area of the
rectangle.​

Answer 1

Answer:

800 cm²

Step-by-step explanation:

Perimeter of rectangle = 120 cm

Length = 40 cm

Perimeter = 2(l+b)

=> 120 = 2(40+b)

=> 60 = 40+b

=> b = 60-40

=> b = 20 cm

Hence, area = l×b = (40×20) cm² = 800 cm²

Answer 2

here the length is given as 40 cm so from the perimeter we have to produce two times of the the length that is 40 cm into to that is 80 CM so 120 - 80 cm is 40 cm so breadth is equal to 20 cm each so the area is equal to 20 into 40 cm that is equal to 800 CM square