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4 February, 19:43

A sphere and a cylinder have the same radius and height. The volume of the cylinder is 64 m^3. What is the volume of the sphere?

A. 64/3 m^3

B. 32 m^3

C. 128/3 m^3

D. 64 m^3

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Answers (1)
  1. 4 February, 20:05
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    The correct answer is C) 128/3 m^3.

    The formula for the volume of a sphere is V=4/3πr³.

    The formula for the volume of a cylinder is V=πr²h.

    Since the cylinder and the sphere have the same height:

    The "height" of the sphere is the same as the diameter. This means the height of the cylinder is equal to the diameter of the sphere, or 2 times the radius:

    h=2r

    Plugging this into our formula for the volume of a cylinder, along with the actual volume, we have:

    V=πr²h

    64=πr² (2r)

    64=2πr³

    Dividing both sides by 2π, we have

    64/2π = r³

    32/π = r³

    Plugging this into our formula for the volume of a sphere:

    V=4/3πr³

    V = (4/3) π (32/π)

    V=128π/3π

    V=128/3
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