Answer:
3.8m
Step-by-step explanation:
Area of a trapezoid formula: [tex]\frac{(B1+B2)h}{2} =A[/tex]
Area=18.8
Height=4
Base 1=5.6
So((5.6+x)*4)/2=18.8
Multiply both sides with 2
(5.6+x)*4=37.6
Divide both sides with 4
5.6+x=9.4
Subtract 5.6 from both sides
X=3.8
Hope this helps!