A thrill seeker with a mass of 87 kg is riding a hang-glider with a mass of 42 kg and holding a rocket launcher (27 kg) loaded with a rocket (11 kg). A spectator on the ground with a radar gun observes the thrill seeker is traveling at a horizontal velocity of 200 m/s at a height above the ground of 380 m. If the thrill-seeker fires the rocket directly behind him, his forward speed increase to 207.4 m/s. Find the horizontal range between the point where the thrill-seeker fires the rocket launcher and the point where the rocket hits the ground.
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