UPSC Prelims 2010·GS1·geography·human and economic geography

Running at a speed of 60 km per hour, a train passed through a 1.5 km long tunnel in two minutes. What is the length of the train?

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Last updated 23 May 2026, 3:31 pm IST
  1. A250 m
  2. B500 mCorrect
  3. C1000 m
  4. D1500 m

Explanation

To find the length of the train, we first calculate the total distance covered in two minutes. The speed of the train is 60 km per hour. To convert this into meters per minute, we multiply 60 by 1000 and divide by 60, which equals 1000 meters per minute. In two minutes, the train covers a total distance of 2000 meters (1000 meters per minute multiplied by 2 minutes). When a train passes through a tunnel, the total distance covered is the sum of the length of the train and the length of the tunnel. The tunnel length is 1.5 km, which is 1500 meters. Therefore, the length of the train is the total distance minus the tunnel length: 2000 meters minus 1500 meters equals 500 meters. The correct answer is B.
geography: Running at a speed of 60 km per hour, a train passed through a 1.5 km long tunnel in two minutes. What is the length of
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