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Q. 3 A man travelled 7 km 500m in the first hour, 5 km685m in the second hour and 2 km 123m in the third hour.How far did he travel in all? |
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Answer» Answer: Given: A man walks 7 km in 2 hrs Later he walks 2 km in 1 hour We need to find the AVERAGE speed and average velocity Solution: We know that Speed = Total distance / Total time Total distance travelled by man = 7 km + 2 km = 9 km Total time TAKEN = 2 + 1 = 3 hrs Average speed = 9/3 = 3 km/hour. Velocity = Total displacement / Total time Average velocity will be the same as average speed in this case since there is no direction change mentioned. Therefore Total Displacement = Total Distance average velocity = average speed = 3 km/hour. Hence Average speed = 3 km/hr. Average velocity = 3 km/hr. Step-by-step explanation: please mark as brainlist follow for more help |
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