Question

The perimeter of a rectangle is 42 cm and its length is double its breadth. Find the len
and breadth of the rectangle.​

Answer 1

Answer:

X = 7cm

Step-by-step explanation:

Perimeter of rectangle = 42 cm

Let breadth = x

Let length = 2x

Perimeter of rectangle = 2(l+b)

42 = 2 ( x +2x)

42/2 = 3x

21 /3 = x

So, x= 7 cm

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Answer 2

Given :

• Perimeter of the rectangle = 42 cm
• It's length is double its breadth.

To find :

• The length and breadth of the rectangle

Solution :

★ Let:-

• The breadth = x
• The length = 2x

★ We know:-

• Perimeter = 2(Length + Breadth)

→ 42 = 2(2x + x)

→ 42 = 4x + 2x

→ 42 = 6x

→ 42/6 = x

→ x = 7

•°• Length = 2x = 14 cm

•°• Breadth = x = 7 cm