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  1. What is the distance between the parllel lines 15x + 8y – 34 = 0 and 15x + 8y + 31 = 0 ?
    1. 2 units
    2. 5 units
    3. 6 units
    4. 65/17 units
Correct Option: D

Distance between two parallel lines 15x + 8y – 34 = 0 and 15x + 8y + 31 = 0 be d

⇒ d =
15x + 8y - 34
15² + 8²

We know that from second equation 15x + 8y = –31
⇒ d =
-31 - 34
225 + 64

=
-65
289

=
-65
17

d =
65
units
17



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