The shaft of a 6 m wide gate in the figure will fail at a moment of $3924 \mathrm{kN} . \mathrm{m}$ about the hinge $P$. The maximum value of water depth $h$ (in $m$ ) that the gate can hold is

___________ (round off to the nearest integer).

Note:

Density of water $=1000 \mathrm{~kg} / \mathrm{m}^3$

Acceleration due to gravity $=9.81 \mathrm{~m} / \mathrm{s}^2$