A train covers a distance of 12 km in 10 minutes. If it takes 6 seconds to pass a telegraph post, then the length of the train is :
Pick:
A) 120 m B) 140 m C) 240 m D) 300 m E) None
Sol.   Speed = [12/10 * 60] km/hr = [72 * 5/18] m/sec = 20 m/sec.   Length of the train = (speed * Time) = (20 * 6)= 
<gadget id="calculator">(20 * 6)</gadget>
<output>120</output>
120 m.   120 mnswer 120 m
<result>A</result>
A train covers a distance of 12 km in 10 minutes. If it takes 6 seconds to pass a telegraph post, then the length of the train is :