Question

The length of a rectangle is twice its breadth. The perimeter of the rectangle is 120 cm. Find the length and breadth of this rectangle. Also find its area.

Answer 1

Length=2x
Breadth=X
Perimeter=120
Perimeter=2(l+b)
120=2(2x+X)
120=2(3x)
120=6x
X=120/6
X=20

Length=2x=2×20=40
Breadth=X=20

Area = l×b
Area = 40 × 20
Area = 800

Answer 2

Answer:

Breadth = 20 cm

Length  = 40 cm

he area of rectangle is 800 sq.cm

Step-by-step explanation:

Let the breadth of rectangle be x

We are given that The length of a rectangle is twice its breadth.

So, length = 2x

Perimeter of rectangle = $2(Length+Breadth)=2(2x+x)=6x$

We are given that The perimeter of the rectangle is 120 cm.

So, $6x=120$

$x=20$

So, Breadth = 20 cm

Length =2x = 2*20 = 40 cm

Area of rectangle = $Length \times Breadth = 40 \times 20 = 800 cm^2$

Hence The area of rectangle is 800 sq.cm