Find the distance between parallel lines
(i) `15 x + 8y 34 = 0`and `15 x + 8y + 31 = 0`
(ii) `l(x + y) + p = 0 and l(x + y) - r =0`.

Explanation

We know that distance between the parallel lines (d) is given as-

`d=(​∣c2​−c1​∣)/sqrt(a^2+b^2)​`

Given lines:-

`15x+8y−34=0`

`15x+8y+31=0`

Here,

`a=15,b=8,c1​=−34,c2​=31`

Therefore,

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