Question: A car travels equal distances in the same direction with velocities 60kmh −1 , 20 km h −1 and 10 km h −1 respectively. The average velocity of the car over the whole journey of motion is
(A) 8ms^{-1}
(B )7ms^{-1}
(C) 6ms^{-1}
(D) 5ms^{-1}
Answer: option (D)
Solution:
