A train covers a distance of 12 km in 10 min. If it takes 15 sec to pass a telegraph post, then the length of the train is?	Choose the correct choice from the following.
A) 100  B) 300  C) 120  D) 400  E) 150
Speed = (12/10 * 60) km/hr = (72 * 5/18) m/sec = 20 m/sec.   Length of the train = 20 * 15= 
<gadget id="calculator">20 * 15</gadget>
<output>300</output>
300 m.   Answer: Option 300
<result>B</result>
A train covers a distance of 12 km in 10 min. If it takes 15 sec to pass a telegraph post, then the length of the train is?