Question:medium

A train running at the speed of 80 km/h crosses a 350 m long tunnel in 36 seconds. What is the length of the train (in meters)?

Updated On: Feb 25, 2026
  • 350
  • 380
  • 420
  • 450
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The Correct Option is D

Solution and Explanation

The problem requires determining the train's length using its speed, the time it takes to traverse a tunnel, and the tunnel's length. The solution proceeds as follows:

The initial step is to convert the speed from kilometers per hour to meters per second:

\(8060×1000 = 800003600 = 22.22\) m/s

Subsequently, the total distance the train travels in 36 seconds is calculated:

\(22.22×36 = 800\) m

This calculated distance represents the combined length of the train and the tunnel. Given that the tunnel measures 350 m in length:

The train's length is determined by subtracting the tunnel's length from the total distance covered:

\(800-350 = 450\) m

The train's length is thus established as 450 meters.

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