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  1. If the volume of a sphere is numerically equal to its surface area then its diameter is
    1. 6 cm
    2. 4 cm
    3. 2 cm
    4. 3 cm
Correct Option: A

Radius of sphere = r units According to the question,

4
πr³ = 4πr² ⇒ r = 3 units
3

∴ Diameter = 2 × 3 = 6 units


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