A) 6cm
B) 3cm
C) 2 cm
D) 5 cm
Correct Answer: D
Solution :
Refer the question figure, \[OM\bot PQ\] \[\Rightarrow \]M is the mid-point of PQ \[MQ=\frac{1}{2}\times 6=3\,cm\] Join OQ, In rt. \[\Delta {\mathrm O}\Mu Q,\]we have \[O{{Q}^{2}}=O{{M}^{2}}+M{{Q}^{2}}={{4}^{2}}+{{3}^{2}}=25\] \[\Rightarrow \]\[OQ=\sqrt{25}=5\,cm\]
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