A train covers a distance of 20 km in 30 min. If it takes 18 sec to pass a telegraph post, then the length of the train is?
Choose the most appropriate option
A) 298 m
B) 125m
C) 120 m
D) 217 m
E) 200 m
Speed = (20/30 * 60) km/hr   = (40 * 5/18) m/sec   = 100/9 m/sec.   Length of the train   = 100/9 * 18= 
<gadget id="calculator">100/9 * 18</gadget>
<output>200</output>
200 m.   Answer: 200 m
<result>E</result>
A train covers a distance of 20 km in 30 min. If it takes 18 sec to pass a telegraph post, then the length of the train is?