Question: A rectangular riser is to be designed for a sand casting mold. the riser has a height of 2 times its width and it is

A rectangular riser is to be designed for a sand casting mold. the riser has a height of 2 times its width and it is of square cross-section. the casting is a square plate, each side is 300mm, and thickness is 25mm. if the metal is cast iron and has mold's constant Cm= 0.04 min/mm2 in chvorinov's rule determine the dimensions of the riser so that it will take 20% longer for the riser to solidify.

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