Question

The length of rectangle is 20cm more than its breadth. If the perimeter is 100cm, find its area​

Answer 1

Step-by-step explanation:

it could be found out by the process given in image at above.

Answer 2

Answer:525$cm^{2}$

Step-by-step explanation:

Given : length of the rectangle is 20 cm

more than its breadth.

Perimeter = 100 cm

To find: Area of the rectangle

Solution:

Let the breadth of the rectangle be x.

Then, length = (x+20)cm

As we know, perimeter of the rectangle = 2×(l+b)

Perimeter of the rectangle =

2×(x+20+x)= 100

2× 2x+20 =100

2x+20 = 100/2

2x+20= 50

2x = 50-20

x = 30/2

x = 15

Therefore, breadth = 15 cm

length= 15+20= 35cm

Now, area of the rectangle = l×b

= 15×35

= 525$cm^{2}$

Hope it helps!