A train covers a distance of 36 km in 12 min. If it takes 7 sec to pass a telegraph post, then the length of the train is?  Choose the correct choice from the following choices:
A) 330	B) 340	C) 350	D) 360	E) 370
Speed = (36/12 * 60) km/hr = (180 * 5/18) m/sec = 50 m/sec.   Length of the train = 50 * 7= 
<gadget id="calculator">50 * 7</gadget>
<output>350</output>
350 m.   Answer: Option 350
<result>C</result>
A train covers a distance of 36 km in 12 min. If it takes 7 sec to pass a telegraph post, then the length of the train is?