Answer:
The answer is "1".
Step-by-step explanation: 
Some of the data is missing in the question, that will be defined in the attached file. please find it. 
In the given EOS the C-D function:
![= [(d((K )/( L)))/(d \ MRTS) * (MRTS)/(((K)/(L)))]](https://img.qammunity.org/2021/formulas/business/college/nrdaoujltvpjn43jz198sftuu6f5hsiiv4.png) 
 
The MRTS value = 

 

Rearrange it 

Replace the values in formula elasticity:
