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0.6

We know that

Intensity of magnetisation

$I = \frac{M}{V}$

[where M = magnetic moment, V = volume]

So, M = IV = 5.0 × 10⁴ × $\frac{12}{100} \times \frac{1}{{(100)}^{2}}$

= 60 × 10⁴ × 10^-6

= 0.6 Am²