Question

Spheres and are uniformly constructed from the same material which is a good conductor of heat and the radius of is thrice the radius of . The rate of fall of temperature of is times that of . When both are at the same surface temperature, the value of is :

A

B

C

D

Medium
Solution
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Correct option is C)

From Newton's law of cooling,

Thus,


Solve any question of Thermal Properties Of Matter with:-
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