Question

20 cl, ule per
ter Ul le 115
The length of a rectangle is 18 cm and its perimeter is 60 cm. find its breadth.​

Answer 1

Answer:

12 cm

Step-by-step explanation:

Given :

• Length = 18 cm
• Perimeter = 60 cm

To find :

• breadth

How to find :

• We shall find it by using transposition method.

Formula Required :

• 2 ( length + Breadth) = perimeter of rectangle.

Let x be the breadth of the rectangle.

Now,

2 ( length + breadth ) = perimeter

→ 2 ( 18 + x) = 60

→ 36 + 2x = 60

→ 2x = 60 - 36

→ x = 24/2

→ x = 12

.°. x = 12

Hence, the breadth of the rectangle is 12 cm.

Answer 2

Length = 18 cm

Perimeter = 60 cm

Breadth = assume b

Perimeter = 2 ( Length + Breadth )

Perimeter = 2 ( 18 + b )

60 = 36 + 2b

or, 60 - 36 = 2b

or, 24 = 2b

or, 24/2 = 12 = b

The breadth of the rectangle is 12 cm.