Question

find the surface area of a hemisphere whose radius is 14cm

Answer 1

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$r = 14 \\ surface \: area \: = 3\pi {r}^{2} \\ = 3 \times \frac{22}{7} \times {14}^{2} \\ = 1848 \\ \\ \\ \\ \\ hope \: it \: helps \: you.$
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Answer 2

  Here, radius (r) is 14.
Surface Area of a hemisphere = 3πr²
As a value for π, we will use : $\frac {22}{7}$
Hence,
 $3 X \frac {22}{7}X r^2$
$= 3 X \frac {22}{7} X (14)^2$
$= 1848$
Therefore, surface area of a hemisphere is 1848.