Problem $3$: $2\mathrm{.}62$ Gate $AB$ in Fig. P$2\mathrm{.}62$ is $15$ ft long and $8$ ft wide into the paper, hinged at $B$

with a stop at $A.$ The gate is $1-$in$-$thick steel, $SG=7\mathrm{.}85.$ Compute the $20C$ water level $h$ for

which the gate will start to fall.

P$2\mathrm{.}62$