Practice question
Question
A man walks 4km in 1hour and then returns to the starting point in 1hour. What is his average speed?
Explanation
Average speed = total distance / total time. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 4 km/h as the result, so option B is correct.