Question

The length of a rectangle is twice the breadth if its perimeter is 48 m then its length is

Answer 1

Here,
x+x+2x+2x=48
6x=48
x=8
Length=16 m
Breadth=8 m

Answer 2

Breadth = x 
length = 2x
perimeter =  48m

according to the sum 
          2(l+b) = 48m
          2 ( x+2x ) = 48
            2x + 4x  = 48
6x = 48
x= 48/6 = 8

breadth = 8 m 
length = 16 m


HOPE IT HELPS U