A passenger train of length 400 m moving at a speed of 72 kmph crossed by a goods train in the same direction of length 350 m in 2min 30 seconds. If the goods train crosses a platform of a certain length in 18 seconds. An athlete crosses the same platform in 20 seconds. Find the speed of the athlete.
1
9 m/s
2
5 m/s
3
8 m/s
4
2 m/s
5
10 m/s