侧面积=3.14*8*2=50.24底面积=3.14*4*4=50.24抹水泥的面积=侧面积+底面积=50.24+50.24=100.48
3.14×﹙8÷2﹚²=3.14×4²=50.24m3.14×8=25.12m25.12×2=50.24m50.24+50.24=100.48m
4x4x3.14+8x3.14x2=50.24+50.24=100.48平方米
32π
4x4x3.14+8x3.14x2=50.24+50.24=100.48