Let PQ be the focal chord of the parabola y2=4x. If the center of the circle having PQ as its diameter lies on the line y=45, then 5PQ (in units) is equal to

Question

Let

P Q

be the focal chord of the parabola

y^{2} = 4 x .

If the center of the circle having

P Q

as its diameter lies on the line

y = \frac{4}{\sqrt{5}},

then

5 P Q

(in units) is equal to

Correct Answer

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