A train takes one minute to cross a tunnel of length 250 meter at the speed of 36 km/hr. Find length of the train .

350 m

Length of train = 250 m

Length of tunnel = X (let)

Time taken to cross the tunnel = 1 minute = 60 sec.

Speed = 36 km/hr

 = \(\frac{36\;×\;5}{18}\) m/sec  = 10 m/sec

To cross the tunnel train needs to travel = Length of train + length of tunnel = 250 +X
Now,

distance = speed × Time

10 × 60  = 250 + X

X = 600 - 250 = 350 m  

Length of tunnel = 350 m