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Find the length of latus rectum of the ellipse   .

Answer (Detailed Solution Below)

Option 3 :
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Detailed Solution

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Concept: 

 

Length of latus rectum of ellipse , L.R =   [b > a] 

Calculation: 

The given equation are, 

⇒  

On comparing with standard equation ,  a = 4 and b = 5 

As we know that , Length of latus rectum =  

∴ L.R =  =  . 

The correct option is 3. 

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