If the container filled with liquid gets accelerated horizontally or vertically, pressure in liquid gets changed. In liquid (`a_(y)`) for calculation of pressure, effective `g` is used. A closed box horizontal base `6 m` by `6 m` and a height `2m` is half filled with liquid. It is given a constant horizontal acceleration `g//2` and vertical downward acceleration `g//2`.
The angle of the free surface with the horizontal is equal to

Options

A. `30^(@)`
B. `tan^(-1)((2)/(3))`
C. `tan^(-1)((1)/(3))`
D. `45^(@)`

Answer

D