Question

Dana has 6 hours to spend training for an upcoming race. She completes her training by running full speed the distance of the race and walking back the same distance to cool down. If she runs at a speed of 9mph and walks back at a speed of 3mph, how long should she plan to spend walking back?

Answer 1

Answer:

3 hrs

Step-by-step explanation:

Avg speed of the round trip = 2 x 9 x 3/(9+3) = 9/2 mi/hr

D = s x t = (9/3)*6 = 18 miles

=> 9 miles each way

=> 3 hours walking back.

HOPE IT HELPS YOU.

THANK YOU.  ^_^

Answer 2

Answer:

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