圆柱高=18.84*18/3/18.84=6底面积=(18.84/3.14/2)^2*3.14*2+18.84*6 =9*3.14+3.14*12 =21*3.14 =65.94
18.84'dqkFIHGQTkwjaUJAmbdejmqDBUYKjqwutgriuqszdjahefgHASDCYUHJR3ADUY7HJB2RWEFHB F 4 WEFUYJHGFAZUGYEWSDFUYGJDFXGHJDXVBAUwef