Question

Donna 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 10 mph and walks back at a speed of 2 mph, how long should she plan to spend walking back?

Answer 1

Avg speed of the round trip = 2*10*2/(10+2) = 10/3 mi/hr

D = r*t = (10/3)*6 = 20 miles

--> 10 miles each way

--> 5 hours walking back.

She'll get bored doing that.

Explanation: