2 . The radius and the vertical height of a metal circular cone are both equal to 18 cm .
( a ) Find the volume of the circular cone expressing your answer in the form a� 10 k , 1�a
� 10 and k � .
16 identical circular cones are to be melted down and remoulded into 27 identical metal hemispheres .
[ 3 ]
( b ) Find the ratio of the radius of the cone to the radius of the hemisphere . [ 4 ]
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