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The bulk modulus of a spherical object is 'B'. If it is subjected to uniform pressure 'p', the fractional decrease in radius is
Explanation
$\Delta V/V = 3\Delta r/r$ for a sphere.
Detailed Solution
$B = \frac{p}{\left(\frac{\Delta V}{V}\right)} \Rightarrow \frac{\Delta V}{V} = \frac{p}{B}$
$3\frac{\Delta r}{r} = \frac{p}{B}$
$\frac{\Delta r}{r} = \frac{p}{3B}$