A train which has 400 m long, is running 45 kmph. In what time will it cross a person moving at 9 kmph in same direction ?
Choose the correct choice from the following answers
A) 56 sec
B) 40 sec
C) 36 sec
D) 29 sec.
E) 19 sec.
Time taken to cross a moving person = length of train/ relative speed   Time taken = 400/((45-9) (5/18)   = 400/ 36*(5/18)   = 400/10= 
<gadget id="calculator">400/10</gadget>
<output>40</output>
40 sec   ANSWER:40 sec
<result>B</result>
A train which has 400 m long, is running 45 kmph. In what time will it cross a person moving at 9 kmph in same direction ?