A hollow sphere of radius R, a hollow cube of side R and a thin circular plate of radius R, made up of the same material, are all heated to 200C above room temperature. When left to cool in the room, which of them will reach the room temperature first ?

Question

[A] Cube

[B] Sphere

[C] Circular plate

[D] All of them will reach the room temperature at the same time

Answer & Explanation
Option: [B]

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