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A cubic casting of 50 mm side undergoes volumetric solidification shrinkage and volumetric solid contraction of 4% and 6% respectively. No riser is used. Assume uniform cooling in all directions. The side of cube after solidification and contraction is

(a) 48.32. mm                        (b) 49.90 mm

(c) 49.94 mm                         (d) 49.96 mm

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