A carrier train when it is 100 km away from the station

Last updated: 6/7/2023

A carrier train when it is 100 km away from the station going a constant speed of 70 kph towards the station At this instant a fast bird from its engine flies towards the station at 100 kph net speed When the bird gets to the station it turns back and flies again towards the train when it reaches engine it again turns and heads towards the station If bird keeps on flying in such a manner find the distance travelled by the bird before train reaches the station How many trips it made in this duration between station and the train