taylacollickp5y9ou taylacollickp5y9ou

16-09-2018
Mathematics

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dana has 6 hours to spend training for an uncoming race. if she runs at a speed of 9 mph and walks back at a speed of 3 mph, how lond should she plan to spend walking back

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telmajo1261 telmajo1261

16-09-2018

Let w = the walking time

the total time is given as 1 hr, therefore (1-w) = running time

Walking dist and running dist is the same

Write a distance equation: dist = speed * time

3w = 9 (1-w)

3w = 9 - 9w

3w + 9w = 9

12w = 9

w = 9/12 = 3/4 hrs walking back

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