What solidification time $(t_5)$ is required for a casting of $9\mathrm{.}5c{m}^3$ and a mold contact area of $10\mathrm{.}0c{m}^2?$

The mold constant is $838\frac{s}{c}{m}^2.$ Show your work before choosing your answer.

a$)650$ s

b$)825$ s

c$)756$ s

d$)550$ s

Hint

Chvorinov's rule: The solidification time, $t=B(\frac{V}{A}{)}^2$

$V==>$ volume of the casting;

$B=>$ the mold constant.

$A=>$ surface area of the casting in contact with the mold: