A fish rising vertically to the surface of water in a lake uniformly at the rate of 3ms^-1 observes a bird diving vertically towards the water at a rate of 9ms^-1 vertically above it. If the refractive index of water is 4//3, the actual velocity of the dive of the bird is

A fish rising vertically to the surface of water in a lake uniformly a

1.	A fish rising vertically to the surface of water in a lake uniformly at the rate of 3ms^-1 observes a bird diving vertically towards the water at a rate of 9ms^-1 vertically above it. If the refractive index of water is 4//3, the actual velocity of the dive of the bird is
Answer» 6 4.5 1.5 2 Answer :B