Question

the perimeter of a rectangle is 120 m and its length is 40 m.find the area of rectangle.​

Answer 1

Answer:

We know

Perimeter of a Rectangle=2(l+b)

that is

2(l+b)=120

2(40+b)=120

80+2b=120

2b=120-80

2b=40

b=40/2

b=20m

therefore the breadth is 20m

And we know

Area of a rectangle=l×b

Area=40×20

=800m²

hope it helps

Answer 2

Answer:

800m²

Step-by-step explanation:

• l = 40m
• b = x meter
• p = 2(l+b)
• 120m = 2× (40+ x)
• x = (120/2)-40
• = 60 - 40
• = 20m
• Area = lb
• = 40×20
• = 800 m²