2026 MSHS P1 Q26

The diagram shows a solid formed from a square pyramid and a cuboid.

\(AD=20\text{ cm}\), \(DE=30\text{ cm}\) and \(VN=7.5\text{ cm}\).

\(N\) is vertically below the vertex \(V\) and \(M\) is the mid-point of \(GF\).

1. Calculate the volume of the solid.[2]
2. Calculate the surface area of the solid.[4]