A marathon runner completes a race in 3 hours and 15 minutes. What is his averag

A marathon runner completes a race in 3 hours and 15 minutes. What is his average speed in km/h if the marathon distance is 42 km? (2022)

A marathon runner completes a race in 3 hours and 15 minutes. What is his average speed in km/h if the marathon distance is 42 km? (2022)

Step 1: Convert the time from hours and minutes to just hours. The runner took 3 hours and 15 minutes.
Step 2: To convert 15 minutes to hours, divide 15 by 60 (since there are 60 minutes in an hour). This gives you 0.25 hours.
Step 3: Add the 3 hours to the 0.25 hours. So, 3 + 0.25 = 3.25 hours.
Step 4: Now, use the formula for average speed, which is Distance divided by Time. The distance of the marathon is 42 km.
Step 5: Plug in the numbers: Average speed = 42 km / 3.25 hours.
Step 6: Calculate the average speed. 42 divided by 3.25 equals approximately 12.92 km/h.
Step 7: Round 12.92 km/h to the nearest whole number, which is 13 km/h.

Time Conversion – Understanding how to convert minutes into hours for accurate calculations.
Average Speed Calculation – Using the formula for average speed, which is distance divided by time.