Q. 73.7( 4 Votes )

The radius of a m A. 2π R α ∆ T

B. π R2 α ∆T

C. 4 π R3 α ∆T / 3

D. 4πR3 α ∆T

Answer :

As we know the volume of sphere

Also given in question that coefficient of linear expansion is also coefficient of cubical expansion


So



Option (d) is matching hence correct option is (d).

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