October 22, 2016

Homework Help: Math word problem

Posted by Erica on Sunday, October 12, 2008 at 1:42pm.

Erik bicycles 32 km/h with no wind. Against the wind he bikes 33 km in the same time it takes to bike 63 km with the wind. What is the speed of the wind?

I don't understand any of the responses.

You have to assume in this case the wind retards and assists with the same force, which is not usually true.


where Vrg is net velocity relative to ground, Vrgs is velocity relative to ground in still conditions, and Vwind is the velocity of the wind.

63km/time=32km/hr+speed wind.

add the equations...

then time= 96/64 hr
Now solve for speed of wind in the first equation..

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