The coordinates of the middle point of the chord cut off by 2x−5y+18=0 on the circle x2+y2−6x+2y−54=0, are
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a
(1, 4)
b
(2, 4)
c
(4, 1)
d
(1, 1)
answer is A.
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Detailed Solution
The mid point is the intersection of the chord and perpendicular line on it from the centre (3, -1). The equation of the perpendicular line is 5x+2y-13=0. Therefore, the required point is (1, 4).