Question #$4$

A cylindrical casting with unknown height has a diameter of $4$ in and its weight is $20$ lb $.$ Such a

casting completely solidifies in $6\mathrm{.}0$ min $.$ Another cylindrical casting has unknown height and

diameter. It is only known that its diameter is equal to its length and its weight is $12$ Ib $.$ Under

exactly same conditions $($mold material, pouring rate $...),$ determine the following parameters

knowing that material to be cast is steel with $=490l\frac{b}{f}{t}^3.$

$($a$)$ The mold constant $C$

$($b$)$ The dimensions of both castings

$($c$)$ The solidification time for $12$ Ib casting