One man ran from the starting point to reach A hut with a 40-meter distance and then ran back to the B-trees are under 20 metres in 10 seconds, the time fit. You shall calculate the average speed.
A man running from the beginning to the cottage A distance of 40 meters and then ran back to stop at a distance of -20 m beneath the trees B takes 10 seconds fitted Calculate the average speed.
A man running from the beginning to the cabin A distance 40 meters and run back to the stop at the ใต้ต้นไม้ B distance - 20 meters. Take all 10 seconds. Then calculates the average speed