A cubical block of side $7 cm$ is surmounted by a hemisphere, then what is the greatest diameter of the hemisphere?

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6cm

7cm

5cm

8cm

answer is B.

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Detailed Solution

Given that the side of the cubical block is 7cm.
We know that the block is surmounted by a hemisphere.
The greatest diameter of the hemisphere will be equal to the length of the cubical block.
The greatest diameter of the hemisphere will be,
=7cm
Thus, the greatest diameter is 7cm.
Therefore the correct option is 2.

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