A train moves past a metal board in 20 sec and a station 300 m long in 50 sec. Its length and speed are:
1
100 m, 20 m/sec
2
200 m, 10m/sec
3
105 m, 10m/sec
4
200 m, 20 m/sec
5
None of the above
A train moves past a metal board in 20 sec and a station 300 m long in 50 sec. Its length and speed are: