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In triangle \(PQR\), the mid-points of \(PQ\), \(QR\) and \(RP\) are \(A\), \(B\) and \(C\), respectively. Find the length of \(PQ\) if \(CB\) is 17 \(cm\)?
 
The length of \(PQ\) \(=\)  \(cm\)