A runner wants to run 12.8 km. She knows that her running pace is 7.1 mi/h.

How many minutes must she run? Hint: Use 7.1 mi/h as a conversion factor between distance and time.

Question

Chemistry

Emeline

8 April, 05:58

A runner wants to run 12.8 km. She knows that her running pace is 7.1 mi/h.

How many minutes must she run? Hint: Use 7.1 mi/h as a conversion factor between distance and time.

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Answers (1)

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Alfonso Duffy · Answer 1

67.2 minutes

First convert the runner's speed from mi/h to km/h by multiplying by 1.60934 km/mi, giving 7.1 mi/h * 1.60934 km/mi = 11.43 km/h Divide the distance by her speed. 12.8 km / (11.43 km/h) = 1.12 h Convert hours to minutes by multiplying by 60 1.12 h * 60 min/h = 67.2 min

A runner wants to run 12.8 km. She knows that her running pace is 7.1 mi/h.How many minutes must she run? Hint: Use 7.1 mi/h as a conversion factor between distance and time.

A runner wants to run 12.8 km. She knows that her running pace is 7.1 mi/h.

How many minutes must she run? Hint: Use 7.1 mi/h as a conversion factor between distance and time.