A train is moving at a speed of 100 km/hour. The length of the train is 100 metre. In how much time will it cross a pole? Select the correct option
A) 1 second
B) 2.5 second
C) 4 second
D) 3.6 second
E) 4.5 second

Rationale: in order to cross the pole , the train will need to cover its own length of 100 meter . to cover 100 x 1000 meter , train takes 60 minutes or 60 x 60 = 3600 second . so , to cover 100 meter , train would take 3600 x 100 / 100 x 1000 = 3.6 second . answer : d .
Answer: D