8 . A factory packages melon juice in cylindrical containers with a base radius of 4 cm and a height of 15 cm .
( a ) Find the volume of one container , giving the answer in terms of � . [ 2 ]
( b ) Find the total surface area of the container , giving the answer in terms of � .
[ 2 ] ( c ) Write down the least number of the cylindrical containers needed such that the sum of the total surface areas of the containers is at least
2
12000 cm . [ 1 ]
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