If the two straight lines x 2k 7 y 3 0 and 3kx 9y 5 0 are perpendicular then the value of k

Choose the correct alternative:
If the two straight lines x + (2k − 7)y + 3 = 0 and 3kx + 9y − 5 = 0 are perpendicular then the value of k is

• k = 3

• k = `1/3`

• k = `2/3`

• k = `3/2`

Concept: Angle Between Two Straight Lines

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