A train is 125 m long. If the train takes 30 seconds to cross a tree by the railway line, then the

A train is 125 m long. If the train takes 30 seconds to cross a tree by the railway line, then the speed of the train is : 14 km/hr (2) 15 km/hr (3) 16 km/hr (4) 12 km/hr

Видео A train is 125 m long. If the train takes 30 seconds to cross a tree by the railway line, then the автора Blossom Breezes