Answer:
The width is 10 meters and the length is 18 meters
Step-by-step explanation:
P = 2( l+w)
56 = 2(l+w)
w = l-8
Substitute for w in the perimeter equation
56 = 2( l+l-8)
Combine like terms
56 = 2 ( 2l-8)
Divide each side by 2
56/2 = 2/2( 2l-8)
28 = 2l-8
Add 8 to each side
28+8 = 2l-8+8
36 = 2l
Divide by 2
36/2 = 2l/2
18 = l
Now find w
w = l-8
w = 18-8
w = 10