圆锥与被淹没的圆柱的体积之比为1:3体积之和 = 30*13*3 = 1170那么被淹没的圆柱体积 = 1170 *3 / (1+3) = 877.5圆柱总体积 = 1170 *3 / (1+3) ÷ (1 - 1/4) = 1170 立方厘米列成全式就是;圆柱总体积 = (30×13×3) × [3/(3+1) ] ÷ (1 - 1/4) = 1170 立方厘米