SOLUTION: Sir Please help me to solve the following question: 3) 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 sp

Question 828205: Sir Please help me to solve the following question:
3) 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?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
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?
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Equations::
With wind:: b + w = 80 km/hr
Against ::: b - w = 40 km/hr
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Add and solve for "b":
2b = 120
b = 60 km/hr (speed of the bird in still air)
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Solve for "w":
b + w = 80
60 + w = 80
w = 20 km/hr (speed of the wind)
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Cheers,
Stan H.
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