Question

the perimeter of a rectangle is 89 CM if its length is 20cm ,find its breadth?​

Answer 1

Answer:

2( l+b)= perimeter

2(20 +b) = 89

40+2b=89

2b= 49

b=49/2

Answer 2

☆ Solution ☆

Given :-

• The perimeter of a rectangle is 89 cm.

• The length of the rectangle is 20 cm.

To Find :-

• The breadth of the rectangle.

Step-by-step-Explaination :-

Let,

• The breadth of the rectangle be b.

Now,

As we know that :-

Perimeter of rectangle = 2 ( length + breadth )

Where,

• The perimeter of a rectangle = 89 cm.

• The length of the rectangle = 20 cm.

• The breadth of the rectangle = b

Putting the respective values,

89 = 2 ( 20 + b )

89 = 40 + 2b

89 - 40 = 2b

49 = 2b

49/2 = b

24.5 = b

Hence,

The breadth of the rectangle is 24.5 cm