Question

a man walks on a straight road from his home to a market 2.5 km away with a speed of 5km/hr. finding the market closed he instantly turns and walks back home with a speed of 7.5km/hr. the average speed of the man over the interval of time 0 - 40 min is equal to?? ( i need solution)a) 5km/hrb) 25/4km/hrc) 30/4km/hr d) 45/8 km/hr

Answer 1

D) 45/8 km/hr is the correct answer