Question

A man went from his house to market 3km away with uniform speed 4km/hour and on finding the market closed he instantly turns back with velocity 6km/h find the average speed?

Answer 1

Explanation:

Average velocity is total displacement upon total time. But his initial and final position are same, so his displacement is zero.

Hence his average velocity is zero.

Answer 2

Answer:

4.8km/h

V=2v1×v2/(v1+v2)

v=2×4×6/(6+4)

v=4.8