Question

8.A train 800m long is running at a speed of 78Kmph ,If it crosses a tunnel in 1 minute, then the
length of the tunnel?
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Answer 1

Answer:

500m

Step-by-step explanation:

Length of the train = 800m

Speed of the train = 78km/hr = 78 × (5/18)m/s

= (65/3) m/s

Time taken = 1 minute = 60 sec

Length of the tunnel = x m

Speed = Total distance/ Time taken

(65/3) = (800 + x)/60

(65/3)× 60 = 800 + x

1300 = 800 + X

==> X = 1300 - 800 = 500m