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A aluminium alloy casting has a cylindrical geometry with 100mm in

diameter and weighs 3200 gram. This casting takes 7.5 min to completely solidify. Another smaller and lighter cylindrical-shaped casting with the same diameter-to-length ratio weighs 1800 gram. This casting is made of the same aluminium alloy and the same conditions of mold and pouring were used. Determine
a) The mold constant in Chvorinov's Rule,
b) The dimensions of the lighter casting
c) The total soldification time of the lighter casting. The density of aluminium alloy= 2.7 gram/cm3 and n=2.

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