385 км/2 года -> 192,5 км/год.
В одном году 365 дней -> 8760 часов -> 31536000 секунд.
В одном километре 1000 метров.
192,5 км/год × 1000 метров : 31536000 с = 192500:31536000 = 0,0061 м/с (примерно).
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385 км за 2 часа = 385 : 2 = 192,5 км/ч - скорость
192,5 км = 192500 м
1 ч = 60 мин = 3600 с
192500 : 3600 = 53,47(2) м/с - скорость
ответ: 53,47(2) м/с.