Civil gate questions

Qns 4.An unit volume of a mass of saturated soil is subjected to horizontal seepage. The saturated unit weight is 22 kN/m3 and the hydraulic gradient is 0.3. The resultant body force on the soil mass is
(a) 1.98 kN
(b) 6.6 kN
(c) 11.49 kN
(d) 22.97 kN