A train 50m long takes 6 sec to cross a man walking at 5kmph in a direction opposite to that of the train. Find the speed of the train?	Choose the correct answer
A) 15kmph B) 25kmph C) 35kmph D) 45kmph E) 55kmph
Let the speed of the train be x kmph   Speed of the train relative to man = x+5 = (x+5)*5/18 m/sec   50/[(x+5)*5/18] = 6   30(x+5) = 900   x = 25kmph   Answer is 25kmph
<result>B</result>
A train 50m long takes 6 sec to cross a man walking at 5kmph in a direction opposite to that of the train. Find the speed of the train?