Two walkers spend from 3 pm until 9 pm walking along a level road, walking up a hill, and reversing their steps down the hill and back along the level road to return back home again. Their pace on the level is 4 mph, uphill 3mph, and downhill 6 mph.
How far did they walk?
To the nearest half hour, at what time did they reach the top of the hill?
Answers in the comments please.
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