Question

what is total surface area of a hemisphere of base radius 7cm?

Answer 1

Hlo friend.. Cutiepie Here..

Here is ur answer :

Total surface area of hemisphere :
$3\pi {r}^{2}$

Radius r of hemisphere = 7 cm

Total surface area :

$= 3 \times \frac{22}{7} \times 7 \times 7$

$= 3 \times 22 \times 7$

$= 66 \times 7$


$= 462 \: \: {cm}^{2}$


HOPE IT HELPS YOU..

Answer 2

Hey friend, Harish here.

Here is your answer:

Given that,

$Radius \ of\ hemisphere= 7\ cm$

We know that,

$T.S.A\ of\ hemisphere =3 \pi r^{2}$

→  $= 3 \times \frac{22}{7} \times 7 \times 7$

→  $= 3\times 22\times 7$
 
→  $= 66 \times 7\ cm^{2}$

→ $= 462 \ cm^{2}$

Therefore total surface area of the hemisphere is 462cm².
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