Question

20. A train 700 m long is running at 72 kmph. If it crosses a tunnel in 1 minute, the length of the tunnel is:

please explain me how to do it ​

Answer 1

ANSWER✅

⤵

Length of train = 700 m

Length of tunnel = X (let)

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

Speed = 72 kmph = (72*5)/18 = 20 m sec.

To cross the tunnel train needs to travel = Length of train + length of tunnel = 700 +X

Now,

S*T = D

20 *60 = 700 +X

X = 1200 - 700 = 500

Length of tunnel = 500 m.

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Answer 2

Step-by-step explanation:

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