A man walks on a straight road from his home to a market 3kms away with a speed of 6km/h. Finding the market closed, he instantly turns and walks back with a speed of 9km/h. What is the (i)magnitude of average velocity (Give answers:- in first case(A)6km/h and second case (B)6km/h)
(ii)average speed of the man over the interval of time (I) 0 to 30 mins (II) 0 to 50 mins (III) 0 to 40 mins. (Given answers :- (I)(A)6km/h (B)6km/h (II)(A)0 (B)7.2 km/h (III)(A) 2.25 km/h (B)6.75 km/h.
Can you explain how did we get these answers?