4. Find the length

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 \(CP = 15\) \(cm\) and \(BC = 5\) \(cm\), then find the length of \(BR\).

 

 

Answer:

 

 The length of \(BR\) \(=\)  \(cm\)