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A runner wants to run 10.4 km . She knows that her running pace is 7.6 mi/h .

How many minutes must she run? Hint: Use 7.6 mi/h as a conversion factor between distance and time. Express your answer using two significant figures.

Respuesta :

Answer:

The runner should run 51 minutes.

Explanation:

Distance wished by runner to cover = d = 10.4 km

Time taken by the runner to cover 10.4 km = T

Speed of the runner  = 7.6 mile/hour

1 mile = 1.60934 km

1 hour = 60 min

[tex]7.6 mile/Hour=\frac{7.6\times 1.60934 km}{1\times 60 min}=0.2038 km/min[/tex]

[tex]Speed=\frac{Distance}{Time}[/tex]

[tex]T=\frac{10.4 km}{0.2038 km/min}=51.0179 min\approx 51 minutes[/tex]

The runner should run 51 minutes.

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