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CGP EDU Academic Team
Published on: September 13, 2026
A sphere, a cube and a thin circular plate, all made of same substance and all have same mass. These are heated to 200 
and then placed in a room, then the
Text Solution
Verified by ExpertsThe correct answer is:
A
∴ ∴ Rate of cooling 
[As masses are equal then volume of each body must be equal because materiel is same]
i.e. rate of cooling depends on the area of cross-section and we know that for a given volume the area of cross-section will be minimum for sphere. It means the rate of cooling will be minimum in case of sphere.
So the temperature of sphere drops to room temperature at last.
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