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 from the line is
Options
- A2
- B3
- C4
- D5
Correct answer
D. 5
Step-by-step solution
The given line is
(\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 ( to the line is (\frac{\left(\mathrm{ax}_1+\mathrm{by}_1+\mathrm{c}\right)}{\sqrt{\mathrm{a}^2+\mathrm{b}^2}}(-1,1) to the line is
(=\frac{|-12-5+82|}{\sqrt{12^2+(-5)^2}}=\frac{65}{\sqrt{144+25}}=\frac{65}{\sqrt{169}}=$5)