A train 140 m long, running with a speed of 63 km/hr will pass a tree in? Pick:  A) 15 sec  B) 16 sec  C) 18 sec  D) 11 sec  E) 8 sec
Speed = 63 * 5/18 = 35/2 m/sec   Time taken = 140 * 2/35= 
<gadget id="calculator">140 * 2/35</gadget>
<output>8</output>
8 sec   ANSW8 secR: 8 sec
<result>E</result>
A train 140 m long, running with a speed of 63 km/hr will pass a tree in?