Answer:
44.8 square yards
Step-by-step explanation:
a = 7.8 yds
b = 5 yds
h = 7 yds
[tex]\sf \boxed{\bf Area \ of \ trapezoid = \dfrac{(a +b)*h}{2}}[/tex]
Here, a and b are the parallel lines and h is the height between the parallel lines.
[tex]\sf = \dfrac{(7.8+5)*7}{2}\\\\= \dfrac{12.8*7}{2}\\\\=6.4*7\\\\=44.8 \ square \ yards[/tex]