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Surface Area of Combined Figures

A right circu...

Question

A right circular cylinder and aright circular cone have equal bases and equal heights. If their curved surfaces are in the ratio 8 : 5, determine the ratio of the radius of the base to the height of either of them.

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Solution

In cylinder

radius = r

height = h

Surface area

In cone

radius = r

height = h

Slant height

Surface area

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