My Valentines Day Question February 14, 2020

By definition, degree of saturation is the ratio of volume of water and volume of voids, voids ratio is the ratio of volume of voids and volume of solid, moisture content is the ratio of weight of moisture and weight of dry soil, and volume is the ratio of weight and specific gravity. So volume of voids is the ratio of volume of water and degree of saturation, volume of solid is the ratio of volume of water and the product of moisture content and specific gravity of solid (since specific gravity of water is $1$ ), and voids ratio is the ratio of the product of moisture content and specific gravity of solid, and degree of saturation, which is equal to $\dfrac{4\times {2.76}}{0.85}\approx \boxed {12.988235294118...}$

$\text{specific gravity} \times \text{moisture content}=\text{degree of saturation} \times \text{void ratio}$

$\text{2.76(4)=0.85e}$

$\color{#69047E}\large{\boxed{e \approx 12.99}}$ $\color{#3D99F6}\boxed{\text{answer}}$