A train 270 m long, running with a speed of 108 km / hr will pass a tree in  Choose the correct choice from the following answers.
A) 12 sec  B) 9 sec  C) 16 sec  D) 20 sec  E) None
Sol.   Speed = (108 x 5/18) m/sec.   = 30 m / sec.   Time taken = (270 x 1/30) sec = 9 sec   Answer 9 sec
<result>B</result>
A train 270 m long, running with a speed of 108 km / hr will pass a tree in