Fall from flying airplane

An airplane is flying horizontally at a height of $$500 \text{ m}$$ above the ground at a speed of $$100 \text{ m/s}.$$ If an object falls freely from the airplane, what is the magnitude of the speed of the object at the moment it touchs the ground?

Gravitational acceleration is $$g = 10 \text{ m/s}^{2}.$$

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