A train 180 meters long passes a pole in 9 seconds. What is the speed of the train in km/h? MCQ with Answer and Explanation

Explanation:
Let total distance be 80 km. First part = 20 km; Time = 20 / 20 = 1 hour. Remaining part = 60 km; Time = 60 / 40 = 1.5 hours. Total distance = 80 km, Total time = 2.5 hours. Average speed = 80 / 2.5 = 32 km/h.

Explanation:
Distance = Speed * Time = 340 * 20 = 6800 meters. Converting to kilometers = 6800 / 1000 = 6.8 km.

Explanation:
Downstream speed = 30 / 3 = 10 km/h. Upstream speed = 30 / 6 = 5 km/h. Speed of stream = (10 - 5) / 2 = 5 / 2 = 2.5 km/h.