SOLUTION: a marine platoon went on a 20 mile hike that took 6 hours to complete. for the first 12 miles he hiked at a constant spped. FOR THE LAST 8 MILES HE INCREASED HIS SPEED BY 1 MPH,

Question 314426: a marine platoon went on a 20 mile hike that took 6 hours to complete. for the first 12 miles he hiked at a constant spped. FOR THE LAST 8 MILES HE INCREASED HIS SPEED BY 1 MPH, FIND THE SPPED OF THE PLATOON ON THE LAST PART OF HIS HIKE.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Rate*Time=Distance

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You also know that

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From above,

Substitute,

Two solutions but only positive solution makes sense in this problem.

Then from above,

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