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The focal distance of a point P on the p...

The focal distance of a point P on the parabola `y^(2)=12x` if the ordinate of P is 6, is

A

12

B

6

C

3

D

9

Text Solution

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The correct Answer is:
B
Given parabola is `y^(2)=12x` .............(i)
Here a=3
For point P(x,y),y=6
This point lie on the parabola
`:. (6)^(2)=12ximplies x=3 `
Now, focal distance of point P is x+a=6
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