Find the total surface area of a hemisphere and a solid hemisphere each of radius 10cm (π = 3.14)

Question:

Find the total surface area of a hemisphere and a solid hemisphere each of radius 10cm (π = 3.14)

Solution:

The surface area of the hemisphere $=2 \pi r^{2}$

$=2 \times 3.14 \times(10)^{2}$

$=628 \mathrm{~cm}^{2}$

The surface area of solid hemisphere $=2 \pi r^{2}$

$=3 \times 3.14 \times(10)^{2}$

$=942 \mathrm{~cm}^{2}$

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