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BITSAT 2011
Exam
BITSAT
Year
2011
Subject
Mathematics
Chapter
Straight Lines

BITSAT 2011 · Mathematics · Straight Lines

The distance of the point (-1,1) from the line 12(x+6)=5(y-2) is

The distance of the point (−1,1)(-1,1) from the line 12(x+6)=5(y−2)12(x+6)=5(y-2) is

Options

  1. A2
  2. B3
  3. C4
  4. D5

Correct answer

D. 5

Step-by-step solution

The given line is 12(x+6)=5(y−2)12(x+6)=5(y-2) (\Rightarrow 12 x+72=5 y-10) or (12 x-5 y+72+10=0 \Rightarrow 12 x-5 y+82=0) The perpendicular distance from ((x1,y1))\left(x_1, y_1\right)) to the line ax+by+c=0a x+b y+c=0 is (\frac{\left(\mathrm{ax}_1+\mathrm{by}_1+\mathrm{c}\right)}{\sqrt{\mathrm{a}^2+\mathrm{b}^2}}.Thepoint((x1,y1))is. The point (\left(x_1, y_1\right)) is(-1,1),therefore,perpendiculardistancefrom, therefore, perpendicular distance from(−1,1)(-1,1) to the line 12x−5y+82=012 x-5 y+82=0 is (=\frac{|-12-5+82|}{\sqrt{12^2+(-5)^2}}=\frac{65}{\sqrt{144+25}}=\frac{65}{\sqrt{169}}=$5)
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