Mud 70% sand and 30% water Sand density = 165 lbm/ft3 (2.65 g/cm3) Water density = 62.3 lbm/ft3 (1g/cm3) Mud density = ??? Mud density = M/V = (sand Mass+ water Mass)/(sand volume + water volume) Volume = mass/density Mud density = (sand mass+ water mass)/ [(sand mass/sand density)+ (water mass/water density)] Mud density = 110.4 lbm/ft3 = 1769 kg/m3