How many seconds will a 400 metre long train take to cross a man running with a speed of 6 km/hr in the direction of the moving train if the speed of the train is 46 km/hr?  Choose the correct choice from the following options
A) 25
B) 30
C) 40
D) 45
E) 36
Explanation :   Speed of train relatively to man = ( 46 - 6)km/hr   = 40 km /hr   = (40 x 5 / 18)m/sec   = 11.11 m/sec   Time taken to pass the man = (400/ 11.11)sec = 36 sec.   Answer : 36
<result>E</result>
How many seconds will a 400 metre long train take to cross a man running with a speed of 6 km/hr in the direction of the moving train if the speed of the train is 46 km/hr?