Question

The perimeter of a rectangle is 120 metre . Its length is double its breadth. Find the length and breadth of the rectangle.​

Answer 1

Answer:

breadth = 20cm

lenght = 40cm

Step-by-step explanation:

lenght = 2b breadth = b

2 (l + b) = 120cm

2 (2b + b) = 120cm

2 (3b) = 120cm

3b = 60 cm

b = 20cm

l = 40cm

Answer 2

Answer:

Length = 40 m, Breadth = 20 m

Step-by-step explanation:

Let the breadth of the rectangle be x m.

ATQ,

Length of rectangle = 2(Breadth)

= 2x m

As we know that,

Perimeter of rectangle = 2(Length + Breath)

Putting know values, we get

→ 120 = 2(2x + x)

→ 120 = 2(3x)

→ 120/2 = 3x

→ 3x = 60

→ x = 60/3

→ x = 20

Now,

Length of rectangle = 2x = 2(20) = 40 m

Breadth of rectangle = x = 20 m