3.14*0.34*0.34*0.88=0.319425立方米，一立方米等于一千升，所以答案是319.4升
3.14×（0.68÷2）²×0.88=3.14×0.34²×0.88=0.362984×0.88=0.31942592立方米≈319升
131.6升
底面积*高=容积
0.34x0.34x3.14x0.88
