Multiple choice question I — task. Mathematics State Board, Class 9.

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1.

$PQ$ and

$RS$ are two equal chords of a circle with centre

$O$ such that

$\angle POQ = 70^\circ$ , then

$\angle ORS =$

$80^\circ$
$70^\circ$
$60^\circ$
$55^\circ$

2. A chord is at a distance of

$15$

$cm$ from the centre of the circle of radius

$25$

$cm$ . The length of the chord is:

$40$ $cm$
$20$ $cm$
$18$ $cm$
$25$ $cm$

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