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Afish rising vertically upward with auni...

Afish rising vertically upward with aunifrom velocity of `8 ms(-1)` , observs that a bird is diving verically downward towards the fish with the veloity of `12ms^(-1) If the refractive index of water is 4/3 , then the actual velocity of the diving bird to pick the fish ,will be ______ms^(-1).

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