i .: A train 120 metres long passes a tree in 5 seconds. How long will

1.	i .: A train 120 metres long passes a tree in 5 seconds. How long will it take to cross a railway platform180 metres long?
Answer» Since the length of the tree is negligible, so distance in first case is taken as the length of the train. Speed = Distance / Time= 120/5= 24 m/s Now , Distance = ( 120 + 180 ) = 300 mSpeed = 24 m/s Time = Distance / Speed= 300 / 24= 25/2= 12.5 seconds

i .: A train 120 metres long passes a tree in 5 seconds. How long will it take to cross a railway platform180 metres long?

Answer»

Since the length of the tree is negligible, so distance in first case is taken as the length of the train.

Speed = Distance / Time= 120/5= 24 m/s

Now ,

Distance = ( 120 + 180 ) = 300 mSpeed = 24 m/s

Time = Distance / Speed= 300 / 24= 25/2= 12.5 seconds