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Question

In the figure below, x = 30. The value of 3y is ___.


A
60
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B
180
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C
120
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D
40
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Solution

The correct option is C 120

Given, x = 30,
So, 2x = 60

Also, 2x + 3y = 180 (Angles on a straight line)

Replacing 2x in the above equation by 60, we have
60 + 3y = 180

3y = 120


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