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Answer: The value of x is 150.
Option (c) x= 150 is correct
Explanation:
Given l1 ║ l2
let ∠1 =30°
∠1 = ∠2 = 30° [Corresponding angle]
Then , ∠2 + ∠3 = 180° [Linear pair]
30° + x° = 180°
x° = 180° - 30°
∴ x = 150°