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On an uphill hike Ted climbs at 3mph. Going back down, he runs at 5mph. If it takes him forty minutes longer to climb up than run down, then what is the length of the hike? 

 Jul 31, 2020
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d / 3      =   d/5   + 2/3      solve for  d       ( 2/3  is 40 minutes )

d  = 3/5 d + 2

2/5 d = 2

d = 5  miles

 Jul 31, 2020

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