The train is running at a speed of 86 km/h on a state railway track and a small car on a parallel road is running at a speed of 40 km/h. How (in s) long will the train take to cross the car completely if the train is 490 m long and they are running in opposite directions?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 14.
Relative speed of train and car = 86 + 40 = 126 km/h
Relative speed in m/sec = 126 × 5/18 = 35 m/sec
Time taken by train to cross the car = 490/35 = 14 sec