A sphere, a cube and a thin circular plate, all made of the same ma...

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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
\( \mathrm{P} \) heated to a temperature of \( 200^{\circ} \mathrm{C} \). When left in air at room temperature, the following cools fastest
[WB-JEE 2016]
W
(a) Sphere
(b) Cube
(c) Plate
(d) All of these
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