What is the porosity of the sand sample?
A)
99%
B)
72%
C)
34%
D)
16%

C) 34%

The other two samples are-

Gravel- D) 38%

Silt- B) 53%

Explanation:

To find the porosity of the sample, you do (volume of fluid)/(volume of substance) X 100. We were given a 300mL sample of sand, and 400 mL of water. You must also take account of how much surface water is found, which you add to however much water you put into the 300mL sample.

Gravel has the highest permeability, and silt has the lowest.

c is the correct answer hope this !