A train 210 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) 12 sec
E) 17 sec
Speed = 63 * 5/18 = 35/2 m/sec   Time taken = 210 * 2/35= 
<gadget id="calculator">210 * 2/35</gadget>
<output>12</output>
12 sec   Answer:12 sec
<result>D</result>
A train 210 m long, running with a speed of 63 km/hr will pass a tree in?