Answer:
It can intersect the solid perpendicularly at both edge, this will automatically create a cross section thereby a circular shape is formed.
Step-by-step explanation:
When the plane is placed perpendicularly, cutting through both edges produces two cross section which in turn creates a circle.
S=rtheta==>theta=s/r
4/7=theta
a=1/2*r^2*theta
a=(1/2)(49)(4/7)
a=14 feet