Question 54
The diameter of a solid hemisphere is 35 cm. What is its total surface area?
(Take $$\pi = \frac{22}{7}$$)
Solution
Total surface area (TSA) of the hemisphere = $$ 3 \pi r^2 $$
(Take $$\pi = \frac{22}{7}$$)
Diameter = 35
Radius = $$ \frac{35}{2} $$
TSA = $$ 3 \times \frac{22}{7} \times \frac{35}{2} \times \frac{35}{2} $$
= $$ \frac{3 \times 11 \times 5 \times 35}{2} $$
= 2887.5
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