The average surface area of a reservoir in the month of June is $20 \mathrm{~km}^{2}$. In the same month, the average rate of inflow is $10 \mathrm{~m}^{3} / \mathrm{s}$, outflow rate is $15 \mathrm{~m}^{3} / \mathrm{s}$, monthly rainfall is $10 \mathrm{~cm},$ monthly seepage loss is $1.8 \mathrm{~cm}$ and the storage change is 16 million $\mathrm{m}^{3}$. The evaporation (in $\mathrm{cm}$ ) in that month is:
(A) 46.8
(B) 136.0
(C) 13.6
(D) 23.4
The average surface area of a reservoir in the month of June is $20 \mathrm{~km}^{2}$. In the same month, the average rate of inflow is $10 \mathrm{~m}^{3} / \mathrm{s}$, outflow rate is $15 \mathrm{~m}^{3} / \mathrm{s}$, monthly rainfall is $10 \mathrm{~cm},$ monthly seepage loss is $1.8 \mathrm{~cm}$ and the storage change is 16 million $\mathrm{m}^{3}$. The evaporation (in $\mathrm{cm}$ ) in that month is:
(A) 46.8
(B) 136.0
(C) 13.6
(D) 23.4