A train is 100 meter long and is running at the speed of 30 km per hour. Find the time it will take to pass a man standing at a crossing.
Choose the correct choice from the following options:  A) 10 sec  B) 12 sec  C) 14 sec  D) 16 sec  E) 20 sec
ANSWER B   As we need to get answer in seconds, so never forget to convert speed into meter per second.   Speed = 30 km/hr = 30* 5/18 m/sec   = 25/3 m/sec   Distance = length of train = 100 meter   Required time = DIST/SPEED = 100/25/3 = 100*3/25= 
<gadget id="calculator">100*3/25</gadget>
<output>12</output>
12sec   ANSWER 12 sec
<result>B</result>
A train is 100 meter long and is running at the speed of 30 km per hour. Find the time it will take to pass a man standing at a crossing.