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10 vehicles traveled on 1-mile distance for 90 seconds and 10 vehicles traveled on 1-mile distance for 120 seconds. When all vehicles traveled at their

10 vehicles traveled on 1-mile distance for 90 seconds and 10 vehicles traveled on 1-mile distance for 120 seconds. When all vehicles traveled at their constant speeds, what is the space-mean-speed and time-mean-speed in mph for all 20 vehicles.

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