 is the volume of the sample when the water content is 10%.
 is the volume of the sample when the water content is 10%.
<u>Explanation:</u>
Given Data:

First has a natural water content of 25% =  = 0.25
 = 0.25
Shrinkage limit, 

We need to determine the volume of the sample when the water content is 10% (0.10). As we know,
![V \propto[1+e]](https://tex.z-dn.net/?f=V%20%5Cpropto%5B1%2Be%5D)
 ------> eq 1
  ------> eq 1

The above equation is at  ,
,

Applying the given values, we get

Shrinkage limit is lowest water content

Applying the given values, we get

Applying the found values in eq 1, we get


 
        
             
        
        
        
I say the answers is A but if you mean ventilation in the area of the room then answer B
        
                    
             
        
        
        
Answer:
The results of a percolation test will determine if there is suitable drainage and the size of the drain field that will be required for a septic system. 
 
        
             
        
        
        
Please add more details because I don’t know if you are using a book or passage, therefore I cannot help you unless you add more detail