A motor car goes from Mumbai to Pune at a speed of 20 km/hr but returns from there at a speed of 30 km/hr. The average speed of the car for the entire journey is
Answer: (2) 25 km/hr.
Average speed = sum of speed /number of speeds
Speeds = 20km/h and 30 km/h
Then, average speed = (20 + 30)/2
= 50/2 = 25 km/h.
Hence, the answer is (2) 25 km/h.