Question

find the total surface area of a hemisphere of radius 7/2cm

Answer 1

T. S. A of Hemisphere
$= 3\pi {r}^{2} \\ = 3 \times \frac{22}{7} \times \frac{7}{2} \times \frac{7}{2} \\ = \frac{33 \times 7}{2} = 110.5 {cm}^{2}$



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Answer 2

Radius=7/2 cm

TSA of hemisphere=3πr^2

=3×22/7×7/2×7/2

=33×7/2

=231/2

=115.5