4. A uniform solid \(S\) consists of two right circular cones of base rate
has height \(2 h\) and the centre of the plane face of this cone is \(O\). T
\(k h\) where \(k > 2\). The two cones are joined so that their plane fac
Figure 2 .

1. Show that the distance of the centre of mass of \(S\) from \(O\) is
   \(\frac { h } { 4 } ( k - 2 )\)