Question

the length of rectangle is twice it's breath. if perimeter is 120m find the length and breath of the rectangle

Answer 1

Length is 2b=l
Breadth is b
Perimeter 2(l+b)
So 2(2b+b)
6b=120
So b is 20
L is 40
Length 40m
And breadth 20m
Area 800sq.m

Answer 2

Let breadth be x
Let length be 2x

Perimeter of rectangle = 2(l+b)
120=2(2x+x)
120÷2=3x
60=3x
60÷3=x
20=x

Breadth = 20m
Length = 2x
=2×20
=40m