Diketahui sebuah tabung memiliki tinggi begin mathsize 14px style 12 space cm end style dan volume begin mathsize 14px style 1.848 space cm cubed end style, maka jari jari tabung dapat dicari dengan menggunakan rumus volume tabung sebagai berikut.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell V subscript tabung end cell equals cell πr squared straight t end cell row cell 1.848 end cell equals cell 22 over 7 cross times straight r squared cross times 12 end cell row cell 12.936 end cell equals cell 264 cross times straight r squared end cell row cell straight r squared end cell equals cell fraction numerator 12.936 over denominator 264 end fraction end cell row blank equals 49 row straight r equals cell square root of 49 end cell row straight r equals cell 7 space cm end cell end table end style