40.5的立方根是好多?派R的平方乘以0.62等于

40.5的立方根是好多?派R的平方乘以0.62等于40.5求R等于好多?

3个回答

40.5的立方根是3.434142728,计算器算的.
πR^2*0.62=40.5
R^2=40.5/(π*0.62)=20.80
所以R=√20.80=4.56