Question

Motorcycle goes from station a to b at 40 km per hour and then returns from b to a at 120 km per hour calculate average speed average velocity during a round trip

Answer 1

Average Velocity = 0 (becoz dislacement is zero)

Average speed =

$(u + v) \div 2 \\ = (120 + 40) \div 2 \\ = 80$

80km/hr