6除以2等于3米
V=π r²h
=3.14乘以3²乘以1.8
=3.14乘以9乘以1.8
=28.26乘以1.8
=50.868㎡
50.868乘以三分之一=16.956㎡
16.956乘以1.7=28.8252吨