In a special triathlon, Denita swam 1 mile in 20 minutes, biked 25 miles in 50 minutes, and then ran 5 miles in 50 minutes. What was her "average" speed in miles/hour for the race, to the nearest tenth?
A) 30.0 miles/hour
B) 13.0 miles/hour
C) 3.0 miles/hour
D) 6.0 miles/hour
E) 15.5 miles/hour

Question

Quizplus · Accepted Answer

To find the average speed, we need to calculate the total distance and the total time, and then divide total distance by total time.

Total distance = 1 mile (swim) + 25 miles (bike) + 5 miles (run) = 31 miles
Total time = 20 minutes (swim) + 50 minutes (bike) + 50 minutes (run) = 120 minutes or 2 hours

Average speed = Total distance / Total time = 31 miles / 2 hours = 15.5 miles/hour (to the nearest tenth)

Therefore, the best choice is E.

In a Special Triathlon, Denita Swam 1 Mile in 20