If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is______________?

If the degree of saturation of a partially saturated soil is 60%, then

1.	If the degree of saturation of a partially saturated soil is 60%, then air content of the soil is______________?
A.	40%
B.	60%
C.	80%
D.	100%
Answer» B. 60%