a circular well with a diameter of 2 metres , is dug to a depth of 14 metres . what is the volume of the earth dug out ?
"sol . volume = π r 2 h = ( 22 / 7 x 1 x 1 x 14 ) m 3 = 44 m 3 . answer d"
volume_cylinder(divide(2, 2), 14)