Radius of Curvature of a Partial Sphere. You and your team need to estimate the radius of curvature of a panel that had

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Radius of Curvature of a Partial Sphere. You and your team need
to estimate the radius of curvature of a panel that had been
removed from some unknown object. You were told that the object was
spherical and, by the size of the panel (about one square meter in
area) and its slight curvature, you estimate that the spherical
object from which it came had been quite large. You notice that the
outer surface has a mirrored metallic finish (like a convex mirror)
and you get an idea. You find a wrench that is 19.5 cm long, and
hold it at a distance of 10.1 m from the middle of the mirrored
surface.
The virtual image of the wrench is 14.1 cm long. Determine the
radius of the sphere from which the panel came.