**Solution:**

Surface area of the cubical wooden box = 6(edge)^{2}

Let the edge of a cube =* l*

∴ Surface area of a cube = 6(*l*)^{2}

Diameter of a hemisphere = *l*

Radius of a hemisphere = l/2

=> Surface area of a hemisphere = 2p r^{2}

Surface area of the remaining solid = Surface area of a cube - Surface area of a hemisphere