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"A solid sphere of copper of radius R an...

"A solid sphere of copper of radius R and a hollow sphere of the same material of inner radius r and outer radius R are heated to the same temperature and allowed to cool in the same environment. Which of them starts cooling faster ?''

A

hollow sphere

B

solid sphere

C

at equal time

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
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