A dove flies at a speed of 40km/h for 2hrs to attend a party.Seeing that he would be late he then increases the speed to 50km/h and travel for 3 hrs. Find the average speed of the journey.
Distance = speed*time
Distance travel at first two hours `= 40xx2 = 80km`
Distance travel at second 3 hours `= 50xx3 = 150km`
Average speed = (total distance)/(total time)
Average speed `= (80+150)/(3+2) = 230/5 = 46 (km)/h`
So the average speed of the dove is 46km/h.