40 ft
perimeter formula for a square, 4s=P
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The perimeter is the distance around the room, The reason the perimeter increased by 18 ft is due to both sides of the room that were lengthened by 9 ft.
Depends on length and width: if it's 10 x 35 then perimeter = 90 ft but if it's 14 x 25 then perimeter is 78 ft. If it's not rectangular then all bets are off!
50 ft
The rectangle with the most area for a given perimeter is the square.Build the room square, with sides of 94-ft. The area is 8,836 square ft.
Perimeter: 9+10+9+10 = 38 feet