Question

Ajay walked at an average speed of 8 km per hour for 45 minutes and then walked at an average speed of 12 kilometre per hour for 40 minutes.What was his average speed for the whole journey?

Answer 1

Answer:

11.2km/hour

Step-by-step explanation:

Ajay walked at an average speed of 8 km per hour for 45 minutes and then walked at an average speed of 12 kilometre per hour for 40 minutes.

so ajay walked =45*8/60 + 40*12/60

                          = 6 + 8

                          = 14km

time ajay walked = (45+40)min

                              =85min = 1hour 25min

avg. speed = total disance/total time

                   =14/1.25

                   =11.2km/hour