PDF chapter test TRY NOW

Prob9.png
 
In the figure, \(CP\) and \(CQ\) are tangents to the circle with the centre at \(O\). \(ARB\) is another tangent touching the circle at \(R\). If \(CP = 11\) \(cm\) and \(BC = 7\) \(cm\), then the length of \(BR\) is: