A marathon is 42 kilometers long. If a runner completes it in 3 hours, what is h

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Question: A marathon is 42 kilometers long. If a runner completes it in 3 hours, what is his average speed in kilometers per hour? (2021)

Options:

Correct Answer: 15 km/h

Exam Year: 2021

Solution:

Average speed = Total distance / Total time = 42 km / 3 hours = 14 km/h.

A marathon is 42 kilometers long. If a runner completes it in 3 hours, what is his average speed in kilometers per hour? (2021)

A marathon is 42 kilometers long. If a runner completes it in 3 hours, what is his average speed in kilometers per hour? (2021)

Step 1: Identify the total distance of the marathon, which is 42 kilometers.
Step 2: Identify the total time taken to complete the marathon, which is 3 hours.
Step 3: Use the formula for average speed, which is Average Speed = Total Distance / Total Time.
Step 4: Plug in the values: Average Speed = 42 kilometers / 3 hours.
Step 5: Calculate the average speed: 42 divided by 3 equals 14.
Step 6: State the average speed: The average speed of the runner is 14 kilometers per hour.

Average Speed Calculation – The average speed is calculated by dividing the total distance traveled by the total time taken.