Question:The third proportional to `0.36` and `0.48` is : 

A `0.64` 
B `0.1728` 
C `24sqrt(.0003)` 
D None of these 

+ Answer
A 

+ Explanation
Let `0.36 : 0.48 = 0.48 : x`.

Then, `0.36x = 0.48 xx 0.48`

 or, `x = (0.48 xx 0.48)/0.36`
  
   `= 0.64`

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Md. Habib Ullah

Editor, VCampus

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