Someone estimates the acceleration of the train with a watch. First, he observes for 3 minutes and finds that the train is moving 540 meters. Then he observes for 1 minute after 3 minutes and the train is moving 360 meters Its analytical formula is a = (360-180) / (6.5-1.5) = 36 m / min * min = 0.6, where 6.5 and 1.5 come from Someone uses a watch to estimate the acceleration of a train. He first observes for 3 minutes and finds that the train is moving 540 meters. After 3 minutes, he observes for 1 minute and the train is moving 360 meters. If the train moves in a straight line with uniform acceleration within 7 minutes, what is the acceleration of the train? A = (360-180) / (6.5-1.5) = 36 m / min * min = 0.6. I just want to know how to calculate 6.5 and 1.5 in this formula. Please answer.

72 beats per minute, 90 beats, or 1.25 minutes
The speed is (3-2) / 1.25 = 0.8 floor / min

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