Q$6$: For a given month, a $1\mathrm{.}2k{m}^2$ lake has $0\mathrm{.}42\frac{m^3}{s}$ of inflow, $0\mathrm{.}32\frac{m^3}{s}$ of outflow,

and a total storage reduction of $4$ ha$-$m$.$ A gauge station next to the lake recorded

a total of $5$ cm precipitation for lake through one month. If the infiltration is

insignificant for the lake:

Estimate the evaporation loss in cm over the lake?

Also, calculate the level of the lake at the end of the month if the beginning level

was estimated as $3\mathrm{.}0$ m $?$

Calculate Runoff coefficient?