A train 880 m long is running at a speed of 78 km/hr.

A train 880 m long is running at a speed of 78 km/hr. If it crosses a tunnel in 1 min, then the length of the tunnel is?

Quiz

Answer/Solution

420

Steps/Work

Speed = 78 * 5/18 = 65/3 m/sec.
Time = 1 min = 60 sec.
Let the length of the train be x meters.
Then, (880 + x)/60 = 65/3
x = 420 m.
Answer: Option D

Physics Calculator / Auto Solver

A train m long is running at a speed of km / hr. If it crosses a tunnel in min, then the length of the tunnel is?

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