A certain soil has the following properties: Gs = 2.71,

A certain soil has the following properties: G_s = 2.71, n = 40% and w = 20%. The degree of saturation of the soil (rounded off to the nearest percent) is ________

81 to 81.5

e =	WG
	S_r

also, e =	η
	1 - η

η = porosity

=	0.4	= 0.67
	1 - 0.4

S =	20 × 2.71	= 81.3%
	0.67