A casting of size 100 mm × 100 mm × 50 mm is required.

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A casting of size 100 mm × 100 mm × 50 mm is required. Assume volume shrinkage of casting as 2.6%. If the height of the riser is 80 mm and riser volume desired is 4 times the shrinkage in casting, what is the appropriate riser diameter in mm?

1. 14.38
2. 20.34
3. 28.76
4. 57.52

Correct Option: A

NA