Question

if sides of a rectangular park are (x+1) and (x-1) respectively it's perimeter is given by

Answer 1

Perimeter of rectangle = [ l + b ]
= 2 [(x+1) + (x-1)]
= 2 ( x+1+x-1)
= 2 ( 2x )
= 4x
Your answer is 4x

Answer 2

2(l+b)=2(x+1+x-1)
=2(2x)
=4x