A marathon is 42.195 kilometers long. If a runner completes it in 3 hours, what

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Question: A marathon is 42.195 kilometers long. If a runner completes it in 3 hours, what is his average speed in km/h? (2021)

Options:

Correct Answer: 13 km/h

Exam Year: 2021

Solution:

Average speed = Total distance / Total time = 42.195 km / 3 h = 14.065 km/h, which rounds to 14 km/h.

A marathon is 42.195 kilometers long. If a runner completes it in 3 hours, what is his average speed in km/h? (2021)

A marathon is 42.195 kilometers long. If a runner completes it in 3 hours, what is his average speed in km/h? (2021)

Step 1: Identify the total distance of the marathon, which is 42.195 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 = 42.195 km / 3 h.
Step 5: Calculate the average speed: 42.195 divided by 3 equals 14.065 km/h.
Step 6: Round the average speed to the nearest whole number, which is 14 km/h.

Average Speed Calculation – The average speed is calculated by dividing the total distance traveled by the total time taken.
Unit Conversion – Understanding the conversion of time into hours when calculating speed in km/h.