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Question

In the above figure, O is the centre of the circle. The angle CBD is equal to
371038_8d60554093a7407ea6b91ebe29c56299.png

A
25
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B
50
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C
40
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D
130
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Solution

The correct option is A 25
Angle subtended by Arc ABC at the centre
O=50
Angle subtended by Arc ABC at any point on the circumference =25
ABC=18025=155
[Since opposite angles of a cyclic quadrilateral are supplementary]
CBD=180155=25

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