Q204 / 270 · NDA 2018 (Phase 2) · Mathematics
Consider the following statements:
1. The distance between the lines
$\mathrm{y}=\mathrm{mx}+\mathrm{c}_1 \text { and } \mathrm{y}=\mathrm{mx}+\mathrm{c}_2 \text { is } \frac{\left|\mathrm{c}_1-\mathrm{c}_2\right|}{\sqrt{1-\mathrm{m}^2}}$
2. The distance between the lines $a x+b y+c_1$ and $\mathrm{ax}+\mathrm{by}+\mathrm{c}_2=0$ is $\frac{\left|\mathrm{c}_1-\mathrm{c}_2\right|}{\sqrt{\mathrm{a}^2+\mathrm{b}^2}}$.
3. The distance between the lines $\mathrm{x}=\mathrm{c}$ and $\mathrm{x}=\mathrm{c}_2$ is $\left|\mathrm{c}_1-\mathrm{c}_2\right|$.
Which of the above statements are correct?
- A1 and 2 only
- Correct answerB2 and 3 only
- C1 and 3 only
- D1,2 and 3
Solution
Using distance between two parallel lines formula.
Hence, the correct answer is option: 'B'.