Multiple choice

Find the total surface area of a hemisphere and a solid hemisphere each of radius $10$ cm (Use $\pi = 3.14)$.

  1. $628\ cm^{2}$ , $942\ cm^{2}$
  2. $314\ cm^{2}$ , $471\ cm^{2}$

  3. Data insufficient

  4. None of these
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A Correct answer
AI explanation

A hollow hemisphere has only an outer curved surface, calculated as 2*pi*r^2, which equals 2 * 3.14 * 10^2 = 628 cm^2. A solid hemisphere includes the curved surface plus the flat circular base, calculated as 3*pi*r^2, which equals 3 * 3.14 * 10^2 = 942 cm^2. The required areas are 628 cm^2 and 942 cm^2 respectively.

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