With the aid of Chvorinov’s rule, calculate the relative solidification times for castings of identical volumes of the following shapes: (a) sphere of diameter ds,; (b) cylinder with h/d =1; (c) cylinder with h/d =10; (d) cube; (e) right rectangular prism with length h (h/a =10 and h/b=10); (f) flat plate of the same length as (e) but of 1/3 the thickness. Plot the results (a to e) to illustrate the effect of shape changes.