圆柱体的底面周长与高相等,已知高是18.84cm,求圆柱的底面积
问题描述:
圆柱体的底面周长与高相等,已知高是18.84cm,求圆柱的底面积
答
2x3.14xr=18.84
6.28r =18.84
r=18.84除6.28
r=3
3.14x9=28.26