A train 490 m long, running with a speed of 63 km/hr will pass a tree in?  Choose the correct choice from the following answers.
A) 18 sec  B) 16 sec  C) 76 sec  D) 15 sec  E) 28 sec
Speed = 63 * 5/18 = 35/2 m/sec   Time taken = 490 * 2/35= 
<gadget id="calculator">490 * 2/35</gadget>
<output>28</output>
28 sec   Answer:28 sec
<result>E</result>
A train 490 m long, running with a speed of 63 km/hr will pass a tree in?