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There are two spherical balls A and B of...

There are two spherical balls A and B of the same material with same surface finish but the radius of A is half than of B. If A and B are heated to the same temperature and allowed to cool then :

A

rate of cooling of both is same

B

rate of cooling of A is four times that of B

C

rate of cooling of A is twice that of B

D

rate of cooling of A is `1//4` time that of B.

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The correct Answer is:
B
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