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The speeder is pulling directly away and rising his distance from a police car which is moving at 27 m/s with respect to the ground. The radar gun in the police car emits the electromagnetic wave having a frequency of 6.00 109 Hz. The wave reflects from the speeder's car and returns to the police car, where its frequency is measured to be 316 Hz less than the emitted frequency. Determine the speeder's speed with respect to the ground.

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