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Sphere or hemisphere: one of surface area or volume given, find the other

This type of question, asked 3 times: 29 Jan 2022 Tier II, 3 Feb 2022 Tier II, 8 Aug 2022 Tier II. All 4 questions below, oldest first.

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  1. Question 1

    29 Jan 2022 Tier II

    49
    The surface area of a sphere is 221.76 cm2\text{cm}^2. Its volume (in cm3\text{cm}^3) is (correct to one decimal place): (Take π=227\pi = \frac{22}{7})

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  2. Question 2

    29 Jan 2022 Tier II

    69
    The volume of a solid hemisphere is 19,404 cm3\text{cm}^3. Its total surface area (in cm2\text{cm}^2) is: (Take π=227\pi = \frac{22}{7})

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  3. Question 3

    3 Feb 2022 Tier II

    52
    The total surface area of a solid hemisphere is 942 cm2\text{cm}^2. Its volume (in cm3\text{cm}^3) is closest to: (Take π=3.14\pi = 3.14)

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  4. Question 4

    8 Aug 2022 Tier II

    90
    The curved surface area of a solid hemisphere is 22 cm222\ \text{cm}^2. What is the total surface area of the hemisphere? (use π=22/7\pi = 22/7)

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