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A jet takes the same time to travel 2500km with the wind as it does to travel 1900 km against the wind. If its speed relative to the air is 450km/hr, what is the speed of the wind?

  • math -

    "same time", so we form an equation by setting the times equal to each other.

    2500/(450+x) = 1900/(450-x)

    cross multiply and solve for x

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