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At 6 A. a snowplow, traveling at a constant speed, begins to clear a highway leading out of town. At 8 A.
At 6 A.M. a snowplow, traveling at a constant speed, begins to clear a highway leading out of town. At 8 A.M. an automobile begins traveling the highway at a speed of 45 mi/hr and reaches the plow 15 minutes later. Find the speed of the snowplow.