Question

The ratio between the length and the breadth of a rectangle is 2:1 . If breadth is 5 less than the length, what will be the perimeter of the rectangle?

Answer 1

Step-by-step explanation:

Let length = 2x and breadth = x

According to the question,

2x - x = 5 => x = 5

Therefore, Required perimeter = 2(2x+x)=2×3x

=2×3×5 = 30 cm

Answer 2

• The perimeter of the rectangle = 30 cm.

Given :

• The ratio between the length and the breadth of a rectangle = 2 : 1.
• The breadth is 5 less than the length.

To Find :

• The perimeter of the rectangle.

Solution :

First, we have to find the length and the breadth of the rectangle.

Let,

The length of the rectangle be 2x.

The breadth of the rectangle be 1x.

According to the question,

→ 2x – 5 = x

→ 2x – x = 5

→ x = 5 cm

So, the sides of the rectangle are :

• The length of the rectangle = 2x = 2 × 5 cm = 10 cm.

• The breadth of the recatngle = 1x = 1 × 5 cm = 5 cm.

Now, we have to find the perimeter of the rectangle.

We know that,

Perimeter of the rectangle = 2 ( l + b )

Where,

• l = length = 10 cm.
• b = breadth = 5 cm.

→ 2 ( 10 cm + 5 cm )

→ 2 ( 15 cm )

→ 2 × 15 cm

→ 30 cm

Hence,

The perimeter of the rectangle is 30 cm.