In what time will a train 200 meters long completely pass an electric pole, if it travels at a speed of 80kmph.  Options: A) 7 B) 9 C) 5 D) 10 E) 3
Sol.   Speed = [ 80x5/18] m/sec =22.2 m / sec.   Time taken = (200/22.2)sec = 9 sec.   Answer 9
<result>B</result>
In what time will a train 200 meters long completely pass an electric pole, if it travels at a speed of 80kmph.