Multiple choice

A 1 km long goods train is running at a speed of 45 km/h. The time taken by this goods train to pass through a 2 km long tunnel is:

  1. 1 minute

  2. 2 minutes

  3. 3 minutes

  4. 4 minutes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The total distance to be covered is the length of the train plus the length of the tunnel, which is 1 km + 2 km = 3 km. At a speed of 45 km/h, the time taken is distance divided by speed, which is 3/45 hours. Converting this to minutes gives (3/45) * 60 = 4 minutes.

AI explanation

The total distance covered equals the train length plus the tunnel length, 1 km plus 2 km, yielding 3 km. Using the formula time equals distance divided by speed, the time is 3 km divided by 45 km/hr, yielding 1/15 hr. Converting to minutes by multiplying by 60 gives 4 minutes.

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