A train of length 150 metres, moving at a speed of 90 km/hr can cross a 200-metre bridge in

To find the time taken to cross the bridge, we first calculate the total distance the train needs to cover. This is the sum of the length of the train and the length of the bridge, which is 150 plus 200, totaling 350 metres. Next, we convert the speed of the train from kilometres per hour to metres per second. To do this, we multiply 90 by 5 divided by 18. This calculation gives a speed of 25 metres per second. Finally, we calculate the time by dividing the total distance by the speed. Dividing 350 metres by 25 metres per second equals 14 seconds. Therefore, option B is the correct answer.