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Given,Length, l = 25cmwidth, b = 15cmheight, h = 20cmmold constant = 4.0 min/cm2Solution,Volume of the given rectangular casting = length * width *thickness = 25 * 15 * 20 = 7500 cm3Surface Area of the given rectangular casting = 2(lb+bh+hl) = 2[ ... See the full answer