Question

2) Length of a rectangle is thrice that of its breadth. Perimeter of a rectangle
is 80 metres. (Take m to be length of a rectangle.)​

Answer 1

Step-by-step explanation:

Perimeter of rectangle is 80 metres

Length of a rectangle is thrice that of its breadth.

Let the breadth be x

Therefore, length =3x

ATQ.

2(3x+x)=80

6x+2x=80

8x =80

X=80/8=10

Therefore breadth =10 metre

And length =3x=3x10=30 metre

Answer 2

Step-by-step explanation:

let breadth of rectangle =x m.

let length of rectangle =3x m.

perimeter of rectangle =2(l+b)

=2(x+3x)

=2(4x)=8x

A.T.Q.

8x=80

x=80/8

x=10

breadth of rectangle =10m.

length of rectangle =8x=8(10)=80m.