Q. A train travels from A to B at the speed of 20 km./hr. and from B to A at the speed of 30 km./hr. Then what is the average speed of train in km./hr.?
A) 24 km./hr
B) 42 km./hr
C) 34 km./hr
D) 48 km./hr
✔ Correct Answer: 24 km./hr
Exam Insight
The average speed is calculated as 2 × (20 × 30) / (20 + 30) = 24 km/hr. Hence, the average speed of the train is 24 km/hr.