Question

A train of length 180 m approaxhes a tunnel of length 620 m. How long will it take the train to pass completely through the tunnel at a speed of 54 km/h

Answer 1

Hi friend here's the solution for your problem

Length of the train = 180m
Length of the tunnel = 620m
After coming out of the tunnel it has to travel it's own length to pass through the tunnel completely.
So distance = 800m (180+620)
Speed = 54km / hr
= 54000m / 60sec
= 900m/sec

Time = distance / speed
= 800m / 900m/s
= (8/9) sec
= 0.889sec (appropriately)

So the train of length 180 metres takes 0.889 seconds to pass through a tunnel of length 680 metres completely.

I hope this will help you........

Answer 2

Step-by-step explanation:

Given,

length of the train= 180 m

length of the tunnel= 620 m

After coming out of the tunnel it has to travel its own length to pass through the tunnel completely.

So, distance = (180+620) m

= 800 m

Given, speed= 54 km/h

we have to convert this to m/s

= 54×1000 ÷ 60×60

= 15 m/s

time= distance÷ speed

= 800÷15

= 53.33 s (Ans)