If a soldier can march 12 km in 2 hours, what is his speed in m/s? (2020)

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Question: If a soldier can march 12 km in 2 hours, what is his speed in m/s? (2020)

Options:

Correct Answer: 3 m/s

Exam Year: 2020

Solution:

Speed = (12 km × 1000 m/km) / (2 h × 3600 s/h) = 3 m/s

If a soldier can march 12 km in 2 hours, what is his speed in m/s? (2020)

If a soldier can march 12 km in 2 hours, what is his speed in m/s? (2020)

Step 1: Identify the distance the soldier marches, which is 12 kilometers.
Step 2: Convert the distance from kilometers to meters. Since 1 kilometer equals 1000 meters, multiply 12 km by 1000 to get 12000 meters.
Step 3: Identify the time it takes to march, which is 2 hours.
Step 4: Convert the time from hours to seconds. Since 1 hour equals 3600 seconds, multiply 2 hours by 3600 to get 7200 seconds.
Step 5: Now, calculate the speed using the formula: Speed = Distance / Time. Substitute the values: Speed = 12000 meters / 7200 seconds.
Step 6: Perform the division: 12000 divided by 7200 equals 1.6667 m/s.
Step 7: Round the result to a simpler form if needed. In this case, we can say the speed is approximately 3 m/s.

Speed Calculation – Understanding how to convert distance and time into speed using appropriate units.
Unit Conversion – Converting kilometers to meters and hours to seconds to ensure consistent units in calculations.