# Find speed in Km/Hr ?

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Percy standing in the midst of a field observes a flying bird in his north at an angle of elevation of #30^@# and after #2min# he observes the bird in his south at an angle of elevation of #60^@# . If the birdflies in a straight line all along at a height of #50sqrt3m# , then find its speed in kilometer per hour.

Percy standing in the midst of a field observes a flying bird in his north at an angle of elevation of

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Dec 11, 2017

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From the diagram we need to find distance c. Using Pythagoras' theorem **a** and **b**

Distance travelled/ time taken = speed

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