A train 500m long takes 10 sec to cross a man walking at 4kmph in a direction opposite to that of the train. Find the speed of the train?	Choose the correct answer:
A) A)174kmph B) B)150kmph C) C)162kmph D) D)145kmph E) E)100kmph
Let the speed of the train be x kmph   Speed of the train relative to man = x+4 = (x+4)*5/18 m/sec   500/[(x+4)*5/18] = 10   10(x+4) = 1800   x = 174kmph   174kmphnswer is 174kmph
<result>A</result>
A train 500m long takes 10 sec to cross a man walking at 4kmph in a direction opposite to that of the train. Find the speed of the train?