Question

the length & breadth of a rectangle are in the ratio of 2 : 1 . if its breadth is 20m, then what is it's perimeter??

Answer 1

Answer:

120 m

Step-by-step explanation:

Given:

Let

• Length of rectangle = 2x
• Breadth of rectangle = x = 20 m

To find:

Perimeter of rectangle = ?

Solution:

According to the Question,

→ Length of rectangle is twice its breadth.

Since Breadth of the rectangle is 20 m,

Length would be 2x = 2(20) = 40 m

Perimeter of rectangle = 2 (Length + Breadth)

⇒ Perimeter = 2 (40 + 20)

⇒ Perimeter = 2 (60)

⇒ Perimeter = 120 m

∴ Perimeter of the rectangle = 120 m

KNOW MORE:

• Rectangle is a type of quadrilateral in which only the oppposite sides are equal and each angle measures 90°
• Area of rectangle = Length × Breadth
• Square is another type of quadrilateral in which all sides are equal and each angle measures 90°

Answer 2

Answer:

120m

Step-by-step explanation:

Given :

Ratio of l : b = 2 : 1

Breadth is 20m

To Find :

Perimeter

Solution :

As ratio of length & breadth of a rectangle are in the ratio of 2 : 1

Length = 2x and breadth is x

As breadth is 20m, x = 20m

Hence, length = 2x = 2 × 20m = 40m

Now, Perimeter = 2(I+b) = 2(40 + 20) = 2 × 60 = 120m

Hope it helps

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