Multiple choice

A train 600 m long traveling at a speed of 60 km/hr takes 1 minute to cross a bridge. How long is the bridge?

  1. 1 km

  2. 400 m

  3. 1.4 km

  4. 600 m
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed = 60 km/hr = 60 * 5/18 m/s = 50/3 m/s. Time = 1 min = 60 s. Distance covered = Speed * Time = (50/3) * 60 = 1000 m. Bridge length = Total distance - Train length = 1000 - 600 = 400 m.

AI explanation

The speed of the train is 60 kilometers per hour, which equals 60 multiplied by 5 / 18, or 50 / 3 meters per second. In 1 minute, which is 60 seconds, the total distance covered at this speed is (50 / 3) * 60 = 1000 meters. Since this distance includes the 600-meter length of the train, the length of the bridge is 1000 - 600 = 400 meters.

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