Can anybody help with this GCSE physics question?

Answer:
[tex] volume = 18.45 \times 18.45 \times 18.45 \\ = 0.00000628 \: {m}^{3} \\ mass = density \times volume \\ = 8.0 \times {10}^{3} \times 0.00000628 \\ = 0.05\: kg[/tex]
[tex] \small \boxed{ \boxed { becker}}[/tex]
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