10. CBQ - Surface area of a hemisphere

Question:

4 m.

The carpenter uses a solid spherical blank of wood to craft hemispherical finials out of it. If the radius of the spherical blank is $11 \ cm$. Using the given information, analyse and answer the following. (Note: Use $\pi = \frac{22}{7}$)

1. What is the radius of the largest hemispherical finial he can carve from the spherical blank?

$28 \ cm$
$7 \ cm$
$21 \ cm$
$11 cm$

2. What is the total surface area of the largest hemispherical finial?

$1958 \ cm^{2}$
$1232 \ cm^{2}$
$1963 \ cm^{2}$
$1141 {cm}^{2}$

3. What is the curved surface area of the largest hemispherical finial?

$2132 \ cm^{2}$
$1432 \ cm^{2}$
$4312 \ cm^{2}$
$761 {cm}^{2}$

4. How many hemispherical finials of maximum size can be crafted from the spherical blank?

$1$
$2$
$3$
$4$

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