A fish at a depth of `12 cm ` in water is viewed by an observer on the bank of a lake. To what height the images of the fish is raised ?

A fish which is at a depth of 12cm in water (mu=4/3) is viewed by an observer on the bank of a lake. Its apparent depth as observed by the observer is …..cm.

A fish which is at a depth of 12 cm in water (mu = (4)/(3)) is viewed by an observer on the bank of a lake. Its apparent depth as observed by the observer is :