Question 971470: Little red riding hood rides to grandmas house at 20 mph . She goes back on the same path at 35 mph . What is the average speed ? Found 2 solutions by josmiceli, Alan3354:Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Average speed is always:
[ total distance traveled ] / [ time to travel that distance ]
Let = one-way distance to grandma's house
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Distance to house:
Distance going back:
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Ave speed:
Divide top and bottom by
Multiply top and bottom by mi/hr
Hope this makes sense
You can put this solution on YOUR website! Little red riding hood rides to grandmas house at 20 mph . She goes back on the same path at 35 mph . What is the average speed ?
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Avg speed = 2*20*35/(20+35)
= 1400/55 = 280/11 mi/hr
=~ 25.45 mi/hr
