Multiple choice

A train runs with a speed of 90 km/hr. A platform of length 350 m is crossed by the train in 30 seconds. What will be the length of the train?

  1. 600

  2. 750

  3. 400

  4. 250
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Speed = 90 km/hr = 90 * (5/18) m/s = 25 m/s. Total distance = Speed * Time = 25 * 30 = 750 m. Total distance = Length of train + Length of platform. 750 = L + 350. L = 400 m.

AI explanation

First, convert the train's speed from kilometers per hour to meters per second by multiplying by 5/18, which makes the speed 25 m/s. The total distance covered when crossing a platform is the sum of the train's length and the platform's length, so 25 multiplied by 30 equals the length of the train plus 350. This results in a total distance of 750 meters, and subtracting the platform's length leaves a train length of 400 meters.

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