The running speed of a person is required.
The speed of the person is [tex]9\ \text{miles per hour}[/tex]
Distance run by the person = [tex]1\dfrac{4}{5}=\dfrac{9}{5}\ \text{miles}[/tex]
Time taken to run the distance = [tex]\dfrac{1}{5}\ \text{hour}[/tex]
Speed is given by
[tex]\text{Speed}=\dfrac{\text{Distance}}{\text{Time}}\\ =\dfrac{\dfrac{9}{5}}{\dfrac{1}{5}}\\ =\dfrac{9}{5}\times 5\\ =9\ \text{miles per hour}[/tex]
The speed of the person is [tex]9\ \text{miles per hour}[/tex]
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