If one end of a focal chord of the parabola, y2 = 16x is at (1, 4), then the length of this focal chord is:

If one end of a focal chord of the parabola, y2 = 16x is at (1, 4), th

1.	If one end of a focal chord of the parabola, y2 = 16x is at (1, 4), then the length of this focal chord is:
A.	25
B.	22
C.	24
D.	20
Answer» B. 22

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If one end of a focal chord of the parabola, y2 = 16x is at (1, 4), then the length of this focal chord is:

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