P = 2(l + w)
p = 356
l = 96
356 = 2(96 + w)
356 = 192 + 2w
356 - 192 = 2w
164 = 2w
164/2 = w
82 = w
check....
p = 2(l + w)
356 = 2(96 + 82)
356 = 2(178)
356 = 356 (correct)
so the width (w) = 82 cm
        
             
        
        
        
The first option is correct
        
             
        
        
        
I got 20,737 but I could be wrong so I will attach my algorithm and work.
 
        
        
        
company a: 2mins 
company b: 7mins 
:)