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Question -

In the figure, if 11| m, what is the value of x?
(a) 60
(b) 50
(c) 45
d) 30



Answer -

In the figure, l || m and n is the transversal

⇒ y = 25°
But 2y + 25° = x+ 15°
(Vertically opposite angles) ⇒ x = 2y + 25° – 15° = 2y+ 10°
= 2 x 25°+10° = 50°+10° = 60° (a)

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