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In a special triathlon, Betty swam 3 miles in 25 minutes, biked 20 miles in 45 minutes, and then ran 6 miles in 40 minutes. What was her "average" speed (in miles per hour) for the race? (Round your answer to the nearest whole number.)

Respuesta :

Answer:

Betty's average speed for the race was approximately 16 mph.

Step-by-step explanation:

Convert times to hours.

Swimming: 25 minutes ÷ 60 minutes/hour = 0.4167 hours

Biking: 45 minutes ÷ 60 minutes/hour = 0.75 hours

Running: 40 minutes ÷ 60 minutes/hour = 0.6667 hours

Calculate total time.

Total time = 0.4167 hours + 0.75 hours + 0.6667 hours = 1.8334 hours

Find the total distance.

Total distance = 3 miles + 20 miles + 6 miles = 29 miles

Calculate average speed.

Average speed = Total distance / Total time

Average speed = 29 miles / 1.8334 hours

Perform the division to find the average speed.

Average speed ≈ 15.81 mph

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