A cylindrical riser is to be designed for a sand casting mold. The length of the cylinder is to

be $2$ times its diameter. The casting is a square plate, each side a$=30$ cm and thickness h$=15$ cm$.$

If the metal is cast iron, and the mold constant in Chvorinov$$s rule $=2\mathrm{.}50$ min$/$cm$2$

$,$ determine :

b$)$ the size of the pattern for this casting by assuming only shrinkage allowance

I need part B $($size$)$