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