Running on a treadmill is slightly easier than running, Physics

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Running on a treadmill is slightly easier than running

Solve the all parts of given question:

Question: Running on a treadmill is slightly easier than running outside because there is no drag force to work against. Suppose a 60 kg runner completes a 5.0 km race in 17 minutes.

Part A: Determine the drag force on the runner during the race. Suppose that the cross section area of the runner is 0.72 m² and the density of air is 1.2 kg/m³.

Part B: What is this force as a fraction of the runner's weight? (D/w)

Could someone please show me the work and explain how to get the answer.

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Physics: Running on a treadmill is slightly easier than running

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Physics: Running on a treadmill is slightly easier than running

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