Question

the lenght of a rectangle is twice its breadth. if the perimeter is 72 meter find the length and breadth of the rectangle.

Answer 1

perimeter of the rectangle=2(l+b)
2(2x + x) where 2x is length and x is breadth
2(3x)=72
6x=72
x=12
2(x)=2(12)
2x=24
bet it's perfect as crystal

Answer 2

length = 2b
breadth = b

perimeter = 2(l+b)
                =2(2b + b)
                =2( 3b)
                =2*3b
                =6b

6b = 72m
b =72/6
   =12

breadth = 12m
length = b*2  = 12*2  = 24m