A woman can hike 2mph faster down a trail to the Lake than she can on the return trip uphill. It takes her 3hours to get to the lake and 6hours to return. What is her speed hiking down to the lake?

Answer 1

3d = (d-2)6 = 6d-12

3d =12

d = 12/3 = 4 mph down

2 mph going up