A train covers a distance of 12 km in 12 min. If it takes 6 sec to pass a telegraph post, then the length of the train is? Choose the most appropriate option
A) 177
B) 168
C) 100
D) 120
E) 122
Speed = (12/12 * 60) km/hr = (60 * 5/18) m/sec = 16.6 m/sec.   Length of the train = 16.6 * 6 = 100 m.Answer:100
<result>C</result>
A train covers a distance of 12 km in 12 min. If it takes 6 sec to pass a telegraph post, then the length of the train is?