Question

a train moving at a constant velocity of 54km/h moves easteards for 30minutes, then due north with the same speed for 40 min. What is avg velocity?

Answer 1

54 km/ h = 15m/s
average velocity = toatal displacement /time
= 15*30 + 15*40/30+40
= 450+600/70 = 1050/70
= 15 m/s.