Concept explainers
Find the speed at the end of training season.
Answer to Problem 33CR
Her speed is
Explanation of Solution
Given:
Suppose a runner takes 45 min to run a route at 8 mi/hr at the beginning of training season. By the end of training season, she can run the same route in 38 min. What is her speed at the end of training season?
Concept Used:
At the beginning the time 45 minutes and the speed is 8 miles/hr.
At the end of session, the time is 38 minutes.
Calculation:
Let the length of the route be L. At the beginning the time 45 minutes and the speed is 8 miles/hr.
So, at the beginning of training session:
Length of the route is 6 miles.
Now at the end of session, the time is 38 minutes and let the speed be x miles/ hour.
Then:
Thus, her speed is
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