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Cylinder and Its Surface Area

A solid metal...

Question

A solid metal sphere is melt and cast into 18 small identical cylinders without any wastage. If the height of each cylinder is the same as its diameter, what is the ratio of the surface area of one cylinder to that of the sphere?

A

1:9

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B

2:3

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C

1:6

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D

2:9

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Solution

The correct option is C 1:6

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