A train 350 m long, running with a speed of 63 km/hr will pass a tree in?  Choose one.
A) 15 sec B) 16 sec C) 18 sec D) 20 sec E) 25 sec
Speed = 63 * 5/18 = 35/2 m/sec   Time taken = 350 * 2/35= 
<gadget id="calculator">350 * 2/35</gadget>
<output>20</output>
20 sec   ANSWER: 20 sec
<result>D</result>
A train 350 m long, running with a speed of 63 km/hr will pass a tree in?