A runner completes a 5 km race in 25 minutes. What is his speed in km/h? (2023)

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Question: A runner completes a 5 km race in 25 minutes. What is his speed in km/h? (2023)

Options:

Correct Answer: 10 km/h

Exam Year: 2023

Solution:

Speed = Distance / Time = 5 km / (25/60) hours = 5 / (5/12) = 12 km/h.

A runner completes a 5 km race in 25 minutes. What is his speed in km/h? (2023)

A runner completes a 5 km race in 25 minutes. What is his speed in km/h? (2023)

Step 1: Identify the distance of the race, which is 5 km.
Step 2: Identify the time taken to complete the race, which is 25 minutes.
Step 3: Convert the time from minutes to hours. Since there are 60 minutes in an hour, divide 25 by 60. This gives you 25/60 hours.
Step 4: Use the formula for speed, which is Speed = Distance / Time.
Step 5: Substitute the values into the formula: Speed = 5 km / (25/60) hours.
Step 6: Simplify the division. To divide by a fraction, multiply by its reciprocal: Speed = 5 km * (60/25).
Step 7: Calculate the multiplication: 5 * 60 = 300 and 300 / 25 = 12.
Step 8: Therefore, the speed of the runner is 12 km/h.

Speed Calculation – Understanding how to calculate speed using the formula Speed = Distance / Time.
Unit Conversion – Converting time from minutes to hours to ensure consistent units in the speed calculation.