Question

Suppose that 40 mL of water is poured simultaneously into each of the containers shown below. After 10 seconds, 5 mL remains atop the gravel sample, 20 mL of water remains atop the sand sample and 28 mL of water remains atop the silt sample. Water continues to seep into each of the substances. Which substance has the lowest permeability?
Answers Are
Gravel
Sand
Silk
It is Impossible To Tell From THe Information Given

WORTH 15 POINTS!!

Answer 1

You can answer that by looking at how much water got  remained atop. The more water atop means less permeability. If something is permeable it let the water diffuse. So the answer is silt. 

Answer 2

Silt

Because it has less air bubbles