A soldier can run 100 meters in 12 seconds. What is his speed in km/h? (2019)

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Question: A soldier can run 100 meters in 12 seconds. What is his speed in km/h? (2019)

Options:

Correct Answer: 20 km/h

Exam Year: 2019

Solution:

Speed = Distance / Time = 100 m / 12 s = 8.33 m/s. Converting to km/h: 8.33 * 18/5 = 30 km/h.

A soldier can run 100 meters in 12 seconds. What is his speed in km/h? (2019)

A soldier can run 100 meters in 12 seconds. What is his speed in km/h? (2019)

Step 1: Identify the distance the soldier runs, which is 100 meters.
Step 2: Identify the time it takes for the soldier to run that distance, which is 12 seconds.
Step 3: Calculate the speed in meters per second (m/s) using the formula: Speed = Distance / Time.
Step 4: Plug in the values: Speed = 100 meters / 12 seconds.
Step 5: Perform the division: 100 / 12 = 8.33 m/s.
Step 6: Convert the speed from meters per second to kilometers per hour (km/h).
Step 7: Use the conversion factor: 1 m/s = 18/5 km/h.
Step 8: Multiply the speed in m/s by the conversion factor: 8.33 m/s * (18/5).
Step 9: Calculate the result: 8.33 * 3.6 = 30 km/h.

Speed Calculation – Understanding how to calculate speed using the formula Speed = Distance / Time.
Unit Conversion – Converting speed from meters per second (m/s) to kilometers per hour (km/h) using the conversion factor.