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An airplane flies west at 150 m/s at an altitude of 1000 m. A searchlight on the ground in the same vertical plane must be

An airplane flies west at 150 m/s at an altitude of 1000 m. A searchlight on the ground in the same vertical plane must be kept on the airplane. WHat is the rate of revolution of the searchlight when the airplane is 500 m due east of the searchlight?

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