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There are 3600 seconds (60x60) in an hour.

3600÷9=400

So in an hour you would cover 20 x 400 metres = 8000 metres or 8.0 km

Use the conversion factor 1km = 0.6214miles

8.0 x 0.6214 = 4.9712 miles.

So round to 1 DP, you would be running at 4.9mph.

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Q: How many miles per hour would I be running if I was going 20 meters per 9 seconds?
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