Answer:Length is 8 feet while width is 5 feet
Step-by-step explanation:
area(a)=Length(L) x width(w)=40
Width(w) + 3=Length(L)
L x w=40
w + 3=L
Substitute L=w+3 in L x w=40
(w+3) x w=40
w^2+3w=40
w^2+3w-40=0
w^2+8w-5w-40=0
w(w+8)-5(w+8)=0
(w-5)(w+8)=0
w-5=0 w+8=0
w=5 w=-8
Therefore width is 5 feet
Substitute w=5 in L=w + 3
L=5+3
L=8
Length=8 feet
