Suresh could see 620 m during fog when he was moving with 4 km/hr. He saw a train coming from behind and disappeared in 4 minute. If the length of the train is 560 m. Then, what is the speed of the train in (km/hr)?
1
60
2
31
3
35
4
40
5
50
Suresh could see 620 m during fog when he was moving with 4 km/hr. He saw a train coming from behind and disappeared in 4 minute. If the length of the train is 560 m. Then, what is the speed of the train in (km/hr)?