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A sphere, a cube and a thin circular plate all made of the same material and having the same mass are initially heated to a temperature of `300^(@)C`.

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A sphere, a cube and a thin circular plate all made of the same material and having the same mass are initially heated to a temperature of `300^(@)C`. Which one of these cools faster ?
A. Sphere
B. Cube
C. Plate
D. None of these
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Correct Answer - C
The rate of cooling is directly proportional to surface area.
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