Question : A man goes to a place on a bicycle at a speed of 16 km/h and comes back at a lower speed. If the average speed is 6.4 km/h in total journey, then the return speed (in km/h) is:

Option 1: 10

Option 2: 8

Option 3: 6

Option 4: 4

Question : A boy rides his bicycle 10 km at an average speed of 12 km/hr and again travels 12 km at an average speed of 10 km/hr. His average speed for the entire trip is approximately:

Option 1: 10.4 km/hr

Option 2: 10.8 km/hr

Option 3: 11.0 km/hr

Option 4: 12.2 km/hr

Question : A man goes to a place on the car at a speed of 144 km/hr and comes back at a lower speed. If the average speed is 60 km/hr in total, then find his returning speed.

Option 1: 40.05 km/hr

Option 2: 37.89 km/hr

Option 3: 33.33 km/hr

Option 4: 22.25 km/hr