A train 100 m long pass a telegraph pole in 5 seconds. Find the speed of the train Options:
A) 66 km/hr  B) 68.4 km/hr  C) 72 km/hr  D) 79.2 km/hr  E) None
Sol.   Speed = [100/5] m/sec = [20 * 18/5] km/hr = 72 km/hr.   Answer 72 km/hr
<result>C</result>
A train 100 m long pass a telegraph pole in 5 seconds. Find the speed of the train