Question 1084502
Hi there,
To walk round the outside of a room 
would be walking around the perimeter of the room
Perimeter = 2 x Length + 2 x breadth.
I will assume length of room = 12' 6" and the breadth
= 9' 3"
Perimeter = (2 x 12' 6") + (2 x 9' 3")
Perimeter = (25') + (18' 6")
Perimeter = 43' 6".
Hope this helps :-)