A train crosses a platform 100 m long in 60 seconds at a speed of 45 kmph.The time taken by the train to cross an electric pole is	Pick one:
A) 8 sec
B) 52 sec
C) 1 minute
D) 2 minute
E) data inadequate
let the length of the train be x m.   and that of platform is 100m.   :., Total distance covered = (x+100)m   Speed of the train= 45 km/hr. = 45*5/18 m/s = 12.5 m/s   Since it crosses the platform in 60 sec.   So, (x+100)/12.5=60   or, x=60*12.5-100= 
<gadget id="calculator">60*12.5-100</gadget>
<output>650</output>
650m   It will cross an electric pole in 650m/12.5m/s=52sec.   ANSWER:52 sec
<result>B</result>
A train crosses a platform 100 m long in 60 seconds at a speed of 45 kmph.The time taken by the train to cross an electric pole is