How much water (in cm) should be filled in a container of height 12 cm, so that it appears half filled to the observer when viewed from the top of the container `(mu=4//3)`.

How much water should be filled in a container of height 21 cm, so that it appears half filled to the observer when viewed from the top of the container (mu=4//3).

How much water should be filled in a container of height 21 cm, so that it appears half filled to the observer when viewed from the top of the container (mu=4//3).

How much water should be filled in a container of height 21 cm, so that it appears half filled to the observer when viewed from the top of the container (mu=4//3).

How much water should be filled in a container of height 21 cm, so that it appears half filled to the observer when viewed from the top of the container (mu=4//3).

How much height of water in cm would be filled in a container of height 14 cm,so that it appears half filled to the observer when viewed from the top of the container (mu_(omega)=4/3)