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Volume of a sphere from its radius or diameter

The same question, asked 2 times: 14 Jul 2023 S1*, 24 Jul 2023 S3. Every wording below, oldest first.

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  1. Question 1

    14 Jul 2023 S1

    71
    The volume of a sphere of radius 4.2 cm is: (Use π=227)\left(\text{Use } \pi = \frac{22}{7}\right)

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  2. Question 2

    24 Jul 2023 S3

    74
    If the diameter of a sphere is 7 cm, then find the volume of the sphere. (use π=227\pi = \frac{22}{7}) (Rounded up to two places of decimal).

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