The radius of a metal sphere at room temperature 
is 
and the coefficient of linear expansion of the metal is 
. The sphere is heated a little by a temperature 
, so that its new temperature is 
. The increase in the volume of the sphere is approximately,
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Let the radius of the sphere be 
. As the temperature increases, radius of the sphere increases as shown in figure.
Original volume, 
Coefficient of linear expansion 
Coefficient of volume expansion 
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