A train 400 m long passes a pole in 20 seconds. What is the speed of the train?
A. 70 km/hr
B. 68 km/hr
C. 72 km/hr
D. 64 km/hr
Answer:C
A train 400 m long passes a pole in 20 seconds. What is the speed of the train?
A. 70 km/hr B. 68 km/hr C. 72 km/hr D. 64 km/hr