Asked by Erica

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?
Answered by Ms. Sue
This school subject is math.
Answered by GuruBlue
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?

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

Vrg=Vrgs+Vwind

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.


Vrgs=32
33km/time=32km/hr-Speedwind
63km/time=32km/hr+speed wind.

add the equations...

33+63)km/time=64km/hr
then time= 96/64 hr
Now solve for speed of wind in the first equation..
33km/time=32km/hr-speedwind.
Answered by David
Now solve for speed of wind in the first equation..
33km/time=32km/hr-speedwind.

How do I do that?
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