The intercept made by the circle x2+y2−6x+2y−28=0 on the line 2x – 5y + 18 = 0 is
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a
3
b
4
c
6
d
2
answer is C.
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Detailed Solution
Given circle is x2+y2−6x+2y−28=0 ….(1) Centre (3,−1), r=38 and given line is 2x−5y+18=0 ….(2)d =perpendicular distance from centre to (2)=|6+5+18|29=29 ∴ The intercept made by (1) on the line=2r2−d2 =238−29=6