Question

Total surface area of a solid hemisphere of radius 7 cm is

Answer 1

I HOPE THIS WILL HELP YOU

GIVEN,
RADIUS = 7CM
TOTAL SURFACE AREA OF SOLID HEMISPHERE =
$= 3\pi {r}^{2} \\ = 3\pi {7 }^{2} \\ = 3 \times \frac{22}{7 } \times 49 \\ = 3 \times 22 \times 7 \\ = 462$

Answer 2

Answer:

The total surface area of a solid hemisphere is $\bold{462 \mathrm{cm}^{2}}$

Given: Radius of the solid hemisphere is 7cm

To find: Total surface area of the solid hemisphere  

We know that  

Formula for TSA is  $\bold{3 \pi r^{2}}$

Where 3 is a constant π=3.14 or 22/7 and r =radius of the solid hemisphere=7cm

Hence we know all the terms to calculate the TSA

So by substituting the values in the formula we get

$\begin{array}{l}{=3 \pi r^{2}} \\ {=3 \times 3.14 \times 7^{2}} \\ {=3 \times 3.14 \times 49} \\ {=461.58 \mathrm{cm}^{2}}\end{array}$

Or, $\begin{array}{l}{3 \pi r^{2}} \\ {=3 \times 22 / 7 \times 7^{2}} \\ {=3 \times 22 \times 7} \\ {=462 \mathrm{cm}^{2}}\end{array}$