Question 828205
If a bird flies 80km/h with the wind but only 40km/h against the wind. What is the bird speed in still air? What is the speed of the wind?
------
Equations::
With wind:: b + w = 80 km/hr
Against ::: b - w = 40 km/hr
--------
Add and solve for "b":
2b = 120
b = 60 km/hr (speed of the bird in still air)
---
Solve for "w":
b + w = 80
60 + w = 80
w = 20 km/hr (speed of the wind)
====================================
Cheers,
Stan H.
================