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A train is moving at 72 km/h and passes a platform in 20 seconds. What is the le

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Question: A train is moving at 72 km/h and passes a platform in 20 seconds. What is the length of the platform if the train is 180 meters long?

Options:

  1. 200 m
  2. 300 m
  3. 400 m
  4. 500 m

Correct Answer: 300 m

Solution: 

Speed of train = 72 km/h = 20 m/s. Time = 20 s. Distance = Speed × Time = 20 m/s × 20 s = 400 m. Length of platform = 400 m - 180 m = 220 m.

A train is moving at 72 km/h and passes a platform in 20 seconds. What is the le

Practice Questions

Q1
A train is moving at 72 km/h and passes a platform in 20 seconds. What is the length of the platform if the train is 180 meters long?
  1. 200 m
  2. 300 m
  3. 400 m
  4. 500 m

Questions & Step-by-Step Solutions

A train is moving at 72 km/h and passes a platform in 20 seconds. What is the length of the platform if the train is 180 meters long?
  • Step 1: Convert the speed of the train from kilometers per hour (km/h) to meters per second (m/s).
  • Step 2: Use the formula: Speed (m/s) = Distance (m) / Time (s).
  • Step 3: Calculate the distance the train travels while passing the platform using the formula: Distance = Speed × Time.
  • Step 4: Subtract the length of the train from the total distance to find the length of the platform.
  • Speed Conversion – Understanding how to convert speed from km/h to m/s.
  • Distance Calculation – Using the formula Distance = Speed × Time to find total distance traveled.
  • Relative Lengths – Calculating the length of the platform by subtracting the length of the train from the total distance.
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