Question 67

What is the total surface area and the curved surface area of a solid hemisphere of radius 14 cm?

Solution

we know that

total surface area of a solid hemisphere = $$3\pi r^{2}$$ ( radius r = 14 cm)

= 3$$\times \pi \times 14 \times 14$$= $$3\times\frac{22}{7}\times14\times14$$ = 1848 $$cm^2$$

curved surface area of a solid hemisphere = $$2\pi r^{2}$$ ( radius r = 14 cm)

= 2$$\times \pi \times 14 \times 14$$= $$2\times\frac{22}{7}\times14\times14$$ = 1232 $$cm^2$$

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