a train moves past a telegraph posta train running at the speed of 60 km/hr crosses a pole in 9 seconds. find the length of the train - Interview Questions

a train moves past a telegraph posta train running at the speed of 60 km/hr crosses a pole in 9 seconds. find the length of the train

A train speed past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is ?

Answer : B. 150 m