A trains covers a distance of 15km in 12 minutes. If it takes 6 sec to pass a pole, the length of the train is:a.125mtsb.190mtsc.150mtsd.110mts

To solve this problem, we first need to find the speed of the train.

1. We know that the train covers a distance of 15km in 12 minutes. To make the units compatible, we need to convert the distance to meters and the time to seconds.

   15km = 15000 meters 12 minutes = 720 seconds

2. Now, we can calculate the speed of the train using the formula: Speed = Distance / Time

   Speed = 15000 meters / 720 seconds = 20.83 m/s

3. We also know that the train takes 6 seconds to pass a pole. The length of the train is the distance it covers in this time.

4. We can find this distance using the formula: Distance = Speed * Time

   Distance = 20.83 m/s * 6 seconds = 125 meters

So, the length of the train is 125 meters. Therefore, the answer is a. 125mts.