Question

A train travelling at 60 km/he crosses a lamp post in 6 seconds. Calculative the time taken by it to cross a tunnel 350m long

Answer 1

Answer:

216sec

Step-by-step explanation:

when the train cross a lamppost it travel it's own lenth.

then the train's lenth =( 6000/3600×6)metre

=10 metre

when the train cross a tunnel it cross both its own lenth & the tunnel ' s height

so, the total lenth is crossed by the train=(10+350)metre

=360m

it cross 10 metre in 6sec

then 360 metre in 6/10×360sec

=216sec