Question 927335
Let length of rectangle be l 
Width  =  5 times the length
   width  = 5l
 area  =  45
 length x width  =45
l x 5l =45
 {{{ 5l^2 =45}}}
  divide with 5 on both sides
{{{ 5 l^2/5= 45/5}}}
 {{{ l^2 =9}}}
         square root on both sides
 {{{ sqrt(l^2) =sqrt(9)}}}
          l=3
  width  = 5x3  = 15 
Perimeter  = 2(length+width)
          =2(3+15)
           =2*18
           =36
Result : Perimeter  = 36