A train of length 200 m, running at a speed of 90 km/hr, crosses four platforms in 3.7 hrs without any stoppages. If the distance between the platforms is 84 km, 142 km and 98 km respectively, then find the average length of a platform.
1
1.4 km
2
1.8 km
3
2.2 km
4
2.6 km
5
3.1 km