Answer:
22 feet
Step-by-step explanation:
Let the length of the first side= x foot
The length of the second side will be 1 foot longer than the length of the first side.
The length of the third side will be 1 foot longer than the length of the second side.
Perimeter of the triangle = 63 feet
Adding the length of the sides
x+x+1+x+2=63
3x+3=63
3x=63-3
3x=60
x=20 feet
Therefore, the length of the third side = 20+2=22 feet