Question

28. A car travels half of the length of straight line motion with a speed of 60 km/h. The remaining part of the distance is covered with speed 40 km/h for half of the time of remaining journey and with speed 20 km/h for the other half of the time. The average speed of the car for the entire journey is
(1) 30 km/h
(2) 40 km/h
(3) 48 km/h
(4) 45 km/h ​

Answer 1

Answer:

48 km/h is right answer...