Dear Student,
Rectangle pqrs and triangle poq have the same base PQ and lie between the parallel SR and PQ
so, ar(POQ)=1/4ar(PQRS)
area of rectangle =l.b
l=20m
b= 28m
=20m.28m
=560sq.m
1/4 ar(PQRS) =1/4.560
=140
area of the shaded region = total rectangle area - triangle area
=560-140
=420
therefore the area of the shaded region equals the 420-meter square
Regards,
Peony Roy.