A Trough Is Filled with a Liquid of Density 855 $\mathrm{m}^{3}$

Multiple Choice

A trough is filled with a liquid of density 855 kg/ $\mathrm{m}^{3}$ . The ends of the trough are equilateral triangles with sides 9 m long and vertex at the bottom. Find the hydrostatic force on one end of the trough.

A) $6.79 \times 10^{5} \mathrm{~N}$
B) $7.79 \times 10^{5} \mathrm{~N}$
C) $9.79 \times 10^{5} \mathrm{~N}$
D) $8.79 \times 10^{5} \mathrm{~N}$
E) $5.79 \times 10^{5} \mathrm{~N}$