Question

if the length of a rectangle is twice its breadth and its perimeter is 120 m then what is length

Answer 1

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)=6x2(Length+Breadth)=2(2x+x)=6x

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

So, 6x=1206x=120

x=20x=20

So, Breadth = 20 cm

Length =2x = 2*20 = 40 cm

Area of rectangle = Length \times Breadth = 40 \times 20 = 800 cm^2Length×Breadth=40×20=800cm2

Hence The area of rectangle is 800 sq.cm

Answer 2

let the breadth ne x

length be 2x

a/q

perimeter= 2(ltb)

120m= 2(x+2x)

60=3x

x = 20

breadth = 20 cm

length = 40 cm