Answer
$r = 6.376 \times 10^{-15} m$
Work Step by Step
The radius of nucleus is given by
$r = r_0 A^{1/3} $
Where $r_0 = 1.20 \times 10^{-15} m$
$A = 150$
So,
$r =(1.20 \times 10^{-15} m) 150^{1/3} $
$r = 6.376 \times 10^{-15} m$
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