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Grace ran 2 5/8 miles in 1/3 of an hour. Her afternoon run took only Her afternoon run took only 1/6 of an hour, but it was 1 1/4 miles shorter than her morning run, but it was 1 1/4 miles shorter than her morning run. What was camaya's average speed for the day

Respuesta :

Speed of Grace in morning :

[tex]v_m = \dfrac{2\dfrac{5}{8}}{\dfrac{1}{3}}\\\\\\v_m = \dfrac{\dfrac{21}{8}}{\dfrac{1}{3}}\\\\v_m = 7.875\ mph[/tex]

Speed in evening :

[tex]v_e = \dfrac{\dfrac{21}{8}-\dfrac{5}{4}}{\dfrac{1}{6}}\\\\v_e = 8.25\ mph[/tex]

Average speed :

[tex]v = \dfrac{v_m + v_e}{2}\\\\v = \dfrac{7.875+8.25}{2}\\\\v = 8.0625\ mph[/tex]

Hence, this is the required solution.

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