Question

Find its lateral surface area
The diameter of hemisphere is 7cm.​

Answer 1

Answer:

the formula 2πrh

Step-by-step explanation:

the lateral surface area of hemisphere is 220 cm

Answer 2

Answer:

$r = \frac{d}{2}$

$r = \frac{7}{2}$

$r = 3.5$

$\mathbb \red{L.S.A. \: of \: Hemisphere = {2\pi r}^{2}}$

$= > 2 \times \frac{22}{7} \times {(3.5)}^{2}$

$= > 2 \times \frac{22}{7} \times \frac{35}{10} \times \frac{35}{10}$

$= > 2 \times 22 \times \frac{35}{10} \times \frac{5}{10}$

$= > \frac{2 \times 22 \times 35 \times 5}{100}$

$= > \frac{7700}{100}$

$= > 77$