SOLUTION: A biker wants to travel 24 miles. He wants to average 10 mph. He is halfway to his destination, and has averaged 8mph. What must his average speed be on the last part to complet
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Question 565217: A biker wants to travel 24 miles. He wants to average 10 mph. He is halfway to his destination, and has averaged 8mph. What must his average speed be on the last part to complete on time?
Answer by ad_alta(240) (Show Source): You can put this solution on YOUR website!
Remember that average speed is total distance over total time. Let the speed be 'v.' Then 10=24/[12/8+12/v]. This gives v=13.33 mph.
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