![A sand casting process has a mold constant of 2 s/mm2 and solidification exponent of 2](https://www.gkseries.com/blog/wp-content/uploads/2023/09/A-sand-casting-process-has-a-mold-constant-of-2-s-mm2-and-solidification-exponent-of-2.jpg)
Q. A sand casting process has a mold constant of 2 s/mm2 and solidification exponent of 2. If the solidification time is to be doubled for a given unit volume of material, the corresponding reduction in the cast surface area (in %) is
Ans: 28-31
Sol:
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Screenshot-853.png)