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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)
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Practice Questions
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Q1
A soldier can run 100 meters in 12 seconds. What is his speed in km/h? (2019)
18 km/h
20 km/h
25 km/h
30 km/h
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Speed = Distance / Time = 100 m / 12 s = 8.33 m/s. Converting to km/h: 8.33 * 18/5 = 30 km/h.
Questions & Step-by-step Solutions
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Q
Q: A soldier can run 100 meters in 12 seconds. What is his speed in km/h? (2019)
Solution:
Speed = Distance / Time = 100 m / 12 s = 8.33 m/s. Converting to km/h: 8.33 * 18/5 = 30 km/h.
Steps: 9
Show Steps
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.
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