A train travels from City A to City B at 60 km/h and returns at 40 km/h. What is the average speed?
Q1. A train travels from City A to City B at 60 km/h and returns at 40 km/h. What is the average speed?
Answer: 48 km/h
Explanation: Average speed = 2 * speed1 * speed2 / (speed1 + speed2) = 2 * 60 * 40 / (60 + 40) = 4800 / 100 = 48 km/h.