Question

The length of a rectangle is 20cm more than its breadth. If the Perimeter is 100 cm, find the
dimension of the rectangle.​

Answer 1

Answer:

length=35cm ,  breadth=15cm

Step-by-step explanation:

let breadth=x

then length=x+20

perimeter=100

2×(x+x+20)=100

2×(2x+20)=100

2x+20=50

x=15

length=x+20=15+20=35cm

breadth= x=15cm

Answer 2

Answer:

• The length of the rectangle = 35 cm

• Breadth of the rectangle= 15 cm

Given :

• The length of a rectangle is 20cm more than its breadth.

• The Perimeter of a rectangular =100 cm.

To find :

• The dimension of the rectangle =?

Step-by-step explanation:

Let, the Breadth of the rectangle be, x cm.

Then, the length of the rectangle be, x + 20 cm.

Perimeter of the rectangle = 100 cm [Given]

We know that,

Perimeter of the rectangle = 2(l +b)

Substituting the values in the above formula, we get,

2 ( l + b) = 100

2( x + 20 + x) = 100

2 (2x + 20) = 100

4x + 40 = 100

4x = 100 - 40

4x = 60

x = 60/4

x = 15

Hence,

The length of the rectangle = x+ 20 ➮ 15 + 20 = 35 cm

Breadth of the rectangle = x = 15 cm