A bird is flying towards south with a velocity 40 \( \mathrm{km} / ...

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A bird is flying towards south with a velocity 40 \( \mathrm{km} / \mathrm{hr} \) and a train is moving with a velocity \( 40 \mathrm{~km} / \mathrm{hr} \)
\( \mathrm{P} \)
towards east. What is the velocity of the bird w.r.t. an
W
observer in train-
(1) \( 40 \sqrt{2} \mathrm{~km} / \mathrm{hr} \). North - East
(2) \( 40 \sqrt{2} \mathrm{~km} / \mathrm{hr} \). South - East
(3) \( 40 \sqrt{2} \mathrm{~km} / \mathrm{hr} \). South - West
(4) \( 40 \sqrt{2} \mathrm{~km} / \mathrm{hr} \). North - West
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