A train 285 m long, running with a speed of 54 km / hr will pass a tree in	Pick.
A) 19 sec B) 15 sec C) 16 sec D) 20 sec E) None
Sol.   Speed = (54 x 5/18) m/sec.   = 15 m / sec.   Time taken = (285 x 1/15) sec = 19 sec   19 secnswer 19 sec
<result>A</result>
A train 285 m long, running with a speed of 54 km / hr will pass a tree in