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Two solid spheres A and B made of the sa...

Two solid spheres A and B made of the same material have radii `r_(A)` and `r_(B)` respectively . Both the spheres are cooled from the same temperature under the conditions valid for Newton's law of cooling . The ratio of the rate of change of temperature of A and B is

A

`(r_(A))/(r_(B))`

B

`(r_(B))/(r_(A))`

C

`(r_(A)^(2))/(r_(B)^(2))`

D

`(r_(B)^(2))/(r_(A)^(2))`

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The correct Answer is:
B
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