A train covers a distance of 12 km in 10 min. If it takes 6 sec to pass a telegraph post, then the length of the train is? Choose the correct choice.
A) 298
B) 288
C) 120
D) 776
E) 991
Speed = (12/10 * 60) km/hr = (72 * 5/18) m/sec = 20 m/sec.   Length of the train = 20 * 6= 
<gadget id="calculator">20 * 6</gadget>
<output>120</output>
120 m.   Answer:120
<result>C</result>
A train covers a distance of 12 km in 10 min. If it takes 6 sec to pass a telegraph post, then the length of the train is?