$10\mathrm{.}82$ If the water surface elevation in reservoir $B$ is $110m,$ what must be the water surface elevation in reservoir $A$ if a flow of $0\mathrm{.}03\frac{m^3}{s}$ is to occur in the cast$-$iron pipe? Draw the HGL and the EGL, including relative slopes and changes in slope.

PROBLEM $10\mathrm{.}82$