To find the length of the train, we can use the formula:
Length of the train = (Speed of the train * Time taken to cross the pole)
First, we need to convert the speed of the train from km/hr to m/s since the time given is in seconds.
Given: Speed of the train = 90 km/hr
To convert km/hr to m/s, we use the conversion factor: 1 km/hr = 1000 m/3600 s
Speed of the train in m/s = (90 km/hr) * (1000 m/3600 s) = 25 m/s (approximately)
Now, the time taken to cross the pole is given as 10 seconds.
Length of the train = (Speed of the train * Time taken to cross the pole) = 25 m/s * 10 seconds = 250 meters
Therefore, the length of the train is 250 meters.