Radius of cylinder is 3 cm, height of cylinder is 5 cm.Volume of the cylinder =πr2h=π(3)2×5=45πcm3Radius of conical hole is 23​ cm and its depth is 98​ cm Volume of conical hole =31​π(R)2×H=31​π(23​)2×98​=32​πcm3Metal left in the cylinder = Volume of cylinder - volume of conical hole=(45π−32π​)=3133π​ cm3Required ratio is =3133​π:32​π=133:2