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If velocity of fish in upward direction...

If velocity of fish in upward direction is 4 m/s with respect to surface and velocity of bird in downward direction with respect to surface is 3 m/s. Then find the velocity of fish with respect to bird (Given that `._(a)mu_(w) = (4)/(3)`)

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From equation (i)
`(dr_(F, B))/(dt) = (dx)/((dt)/(._(1)mu^(2))) + (dy)/(dt) = ((-4))/((4)/(3))+ (-3) = -3+(-3) = -6 m//s`
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