A train covers a distance of 9 km in 6 min. If it takes 5 sec to pass a telegraph post, then the length of the train is? Choose the most appropriate option:
A) 100
B) 105
C) 110
D) 120
E) 125
Speed = (9/6 * 60) km/hr = (90 * 5/18) m/sec = 25 m/sec.   Length of the train = 25 * 5= 
<gadget id="calculator">25 * 5</gadget>
<output>125</output>
125 m.   Answer: Option 125
<result>E</result>
A train covers a distance of 9 km in 6 min. If it takes 5 sec to pass a telegraph post, then the length of the train is?