How many seconds will a train 200 meters long running at the rate of 36kmph take to pass a certain telegraph post?  Choose the correct answer
A) 10sec  B) 20sec  C) 25sec  D) 30sec  E) 35sec
Distance = length of train = 200meters   Speed = 36kmph = 36*5/18= 
<gadget id="calculator">36*5/18</gadget>
<output>10</output>
10m/s   Required time= 200/10= 
<gadget id="calculator">200/10</gadget>
<output>20</output>
20sec   Answer is 20sec
<result>B</result>
How many seconds will a train 200 meters long running at the rate of 36kmph take to pass a certain telegraph post?