In the given figure, lines AB and CD intersect at O. If ∠AOC + ∠BOE = 70o and ∠BOD = 40o, the value of 2(∠BOE) is ____.
A
50o
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B
30o
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C
60o
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D
90o
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Solution
The correct option is C60o In the given figure, ∠AOC=∠BOD=40o[verticallyoppositeangles] Given that ∠AOC+∠BOE=70o, we get 40o+∠BOE=70o⇒∠BOE=30o Thus, 2(∠BOE)=60o.