Answer
$I = 0.15~kg~m^2$
Work Step by Step
We can use the parallel axis theorem to find the rotational inertia:
$I = \frac{1}{2}MR^2+Md^2$
$I = \frac{1}{2}(20~kg)(0.10~m)^2+(20~kg)(0.050~m)^2$
$I = 0.15~kg~m^2$
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