Question

the length of the rectangle is twice than it's breadth . If its perimeter os 450cm. find the length and breadth.​

Answer 1

Answer:

Step-by-step explanation:

Let the breadth of the rectangle is b cm.

So, the length of the rectangle is 2b cm.

We know that the perimeter of rectangle is

=2(l+b)

Since, perimeter of rectangle is 120 cm.  

Therefore,

6b=120

b=20 cm

And l=40 cm

So, the area of rectangle is

=20×40=800 cm2

Hence, the length is 40 cm, breadth is 20 cm and area is 800 cm2.

Answer 2

Answer:

Let the breadth of the field = x cm ∴ its length = 2x and, its perimeter = 2 x (length + breadth) = 2 x (2x + x) = 2(3x) = 6x cm Perimeter = 60 cm

60 cm = 6x cm

x = 60/6 = 10 cm

Breadth = x cm = 10 cm

Length = 2x cm = 20 cm

Step-by-step explanation:

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