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Q83 (NDA-II/2023) Science & Technology › Basic Science (Physics, Chemistry, Biology) Official Key

Ram records the odometer readings of his car for the distance covered from 2000 km at the start of his journey and 2400 km at the end of the journey after 8 hours. What is the average speed of the car ?

Explanation

To determine the average speed of the car, we apply the fundamental formula from basic physics (kinematics):

Average Speed = Total Distance Covered / Total Time Taken

  • Total Distance: The distance covered is calculated by finding the difference between the final and initial odometer readings.
    Distance = 2400 km - 2000 km = 400 km.
  • Total Time: The time duration for the journey is provided as 8 hours.

By substituting these values into the formula:

Average Speed = 400 km / 8 hours = 50 km/h.

This calculation confirms that the average speed of the car is 50 km/h, making Option A the correct answer.

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