A cube a pyramid with all four faces identical and a sphere all of them hollow are made from the same material and have equal mass and bound equal volume they are heated to the same temperature and then left to cool. after sometime

Sphere will have the highest temperature

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Pyramid will have the highest temperature

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Cube will have the lowest temperature

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Sphere will have the lowest temperature

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Solution

The correct option is B Cube will have the lowest temperature
Here,

As all the three have same volume,

The most cooled one will have most surface area,

And for same volume,

Cube will have maximum surface area, and sphere will have minimum surface area.

Hence cube will have the minimum temperature after being cooled.

Option $C$ is the correct answer.

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