A steel cube of side 10 cm is made by the sand-casting process. A cylindrical side-riser with diameter, \( d \), and height, \( h \), needs to be used.
Assume:
- No surface sharing between the riser and casting.
- \( d = h \).
- The connecting link between the riser and casting does not freeze before the casting.
- All the surfaces of the riser and casting are subjected to identical cooling conditions.
In this situation, which ONE or MORE among the following values of \( d \) (in cm) can theoretically fully compensate for shrinkage during casting?