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For a sphere of radius $10$ cm, the numerical value of the surface area is how many percent of the numerical value of its volume?

  1. $26.5\%$
  2. $24\%$
  3. $30\%$
  4. $45\%$
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ans :-- option C

surface area :-- 4 * pie * R^2

volume :-- 4 * pie * R^3 / 3

percentage = 4 * pie * 10 * 10 *100 / (4/3) * pie * 10 * 10 * 10

                  = 30 %
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