SOLUTION: On a four mile hike, you walk the first 2 miles at 3m/hr. How fast will you have to go in order to arrive exactly one hour after you left?

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Question 901165: On a four mile hike, you walk the first 2 miles at 3m/hr. How fast will you have to go in order to arrive exactly one hour after you left?
Found 2 solutions by josgarithmetic, lwsshak3:
Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
RT=D, total must be 4 miles.

ALSO time total must be 1 hour.

T=D/R

2%2F3%2B2%2Fr=1 to account for the 1 hour total time.
Solve for r.

Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
On a four mile hike, you walk the first 2 miles at 3m/hr. How fast will you have to go in order to arrive exactly one hour after you left?
***
For first 2 miles:
Travel time=distance/speed=2/3 hr, leaving 1/3 hr to finish 2 miles of hike
speed=distance/travel time
required speed=2/(1/3)=6
How fast will you have to go in order to arrive exactly one hour after you left?
6 mph