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Question

In the figure below, lines AB and CD intersect at O. If AOC + BOE = 70 and BOD = 40, find (2BOE).


A

50

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B

30

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C

60

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D

40

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Solution

The correct option is C

60


AOC+BOE+COE=180 (AOB is a straight line)

Given, AOC+BOE=70

So, COE=180(AOC+COE)

18070=110

Again, COE+BOE+BOD=180 (COD is a straight line)

We know that, COE=110 and BOD=40

So, BOE=180COEBOD

BOE=18011040=302BOE=60


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