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?

  • A
    1 and 2 only
  • Correct answer
    B
    2 and 3 only
  • C
    1 and 3 only
  • D
    1,2 and 3

Solution

Using distance between two parallel lines formula.

Hence, the correct answer is option: 'B'.

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