A plumbline (sahul) is the combination of (see Fig.)

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a cone and a cylinder

a hemisphere and a cone

frustum of a cone and a cylinder

sphere and cylinder

answer is B.

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Detailed Solution

Given is a plumbline (sahul).
Question Image

In the figure, the plumbline is the combination of a hemisphere and a cone.
The upper part is half of a sphere, that is hemisphere.
The lower part is a cone.
Thus, the plumbline is a combination of hemisphere and cone.
Therefore, option (2) is correct.

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