/(R-r)=√3/2
R=r(1+√3/2)/(√3/2)=r(2√3/3+1)
πr^2=6,r=√(6/π)
R=(2√3/3+1)√(6/π)=√(8/π)+√(6/π)
=1.5957691216057307117597842397375+1.3819765978853419170609785841276
=2.9777457194910726288207628238645
线管内半径大于3即可
/(R-r)=√3/2
R=r(1+√3/2)/(√3/2)=r(2√3/3+1)
πr^2=6,r=√(6/π)
R=(2√3/3+1)√(6/π)=√(8/π)+√(6/π)
=1.5957691216057307117597842397375+1.3819765978853419170609785841276
=2.9777457194910726288207628238645
线管内半径大于3即可