4. (MGSE 9- 12.G.C. 5) If sector area of the shaded circle garden is 87t, and radius of the circle garden is 8 inch. Below figure represent the given scenario, then find measurement of the central angle AOB. A) Angle AOB is 30 degree B) Angle AOB is 45 degree C) Angle AOB is 60 degree DI Anele AOB is 120 degree.

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