\"\"

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Given that diameter of a hemisphere(d) = 8.4 m.

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\"\"                            (Diameterof a hemisphere)

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\"\"                        (Substitute \"\")

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\"\"                   (Divide each side by 2)

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\"\"                          (Simplify)\"\"

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Volume(V):

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\"\"          (Volume of a hemisphere)

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\"\" (Substitute \"\")

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\"\"    (Evaluate powers)

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\"\"        (Multiply)

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\"\"                   (Simplify)

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\"\"         (Substitute \"\")

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\"\"                   (Multiply)\"\"

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The volume of a hemisphere is approximately 154.8 cubic meters.