SOLUTION: Total distance = 20 miles How fast do you have to go for the last 10 miles for the average velocity for the entire trip to be 5 mi/h? Given the average velocity for the first 10 m

Question 333997: Total distance = 20 miles How fast do you have to go for the last 10 miles for the average velocity for the entire trip to be 5 mi/h?
Given the average velocity for the first 10 miles. Is it possible to have a 20mi/hr average velocity for te total 20 miles.
Why or why not?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Total distance = 20 miles
How fast do you have to go for the last 10 miles for the average velocity for the entire trip to be 5 mi/h?
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If average velocity is 5 mph, time = 20/5 = 4 hours.
Not knowing the speed/time of the 1st 10 miles you
cannot determine the time needed for the last 10 miles.
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Given the average velocity for the first 10 miles. Is it possible to have a 20mi/hr average velocity for the total 20 miles.
Why or why not?
That depends on the time/speed of the 1st 10 miles.
If the 1st 10 miles takes more that 1 hr you cannot
get an average of 20 mph for the 20 miles because
the total time to average 20 mph for 20 miles is 1 hr.
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Cheers,
Stan H.
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