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Questions  >>  Olympiad-Math  >>  Class 10
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Q)

In the given figure chords AB and CD of a circle intersect at O.AO=5 cm,BO=3 cm and CO=2.5 cm.Then the length of DO=______

$\begin{array}{1 1}6\;cm\\5\;cm\\6.5\;cm\\5.5\;cm\end{array} $

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