Question

The radius of a hemisphere is 4 em, then curved surface of hemisphere will be ​

Answer 1

Answer:

.

Step-by-step explanation:

CSA of hemisphere = 2 π r 2 (r square)

= 2 × 22/7 × 4 × 4

= 100.57

Answer 2

Correct Question-:

• The radius of a hemisphere is 4 cm, then curved surface of hemisphere will be _____________ .

AnswEr-:

• $\underline{\boxed{\star{\sf{\blue{ Curved \:Surface\:Area\:of\:Hemisphere\:=\:100.48cm^{2}[Approx]}}}}}$

EXPLANATION-:

• $\underline{\sf{\large {Given -:}}}$
• The radius of Hemisphere is 4 cm .

• $\underline{\sf{\large {To\:Find -:}}}$
• The Curved Surface Area or CSA of Hemisphere.

$\dag{\sf{\large {Solution -:}}}$

• $\underline{\boxed{\star{\sf{\blue{ Curved \:Surface\:Area\:of\:Hemisphere\:=\:2\times \pi \times Radius^{2}}}}}}$

• $\underline{\sf{\large {Here -:}}}$
• The radius of Hemisphere is 4 cm .
• $\sf{\large {\pi \: = \dfrac{22}{7}}}$

$\dag{\sf{\large {Now -:}}}$

• $\implies {\large{\sf{2 \times \dfrac{22}{7} \times (4)^{2}}}}$

• $\implies {\large{\sf{2 \times \dfrac{22}{7} \times 16}}}$

• $\implies {\large{\sf{ \dfrac{2\times22}{7} \times 16}}}$

• $\implies {\large{\sf{ \dfrac{44}{7} \times 16}}}$

• $\implies {\large{\sf{ 6.28 \times 16}}}$

• $\implies {\large{\sf{ 100.48cm^{2}[Approx]}}}$

Hence,

• $\underline{\boxed{\star{\sf{\blue{ Curved \:Surface\:Area\:of\:Hemisphere\:=\:100.48cm^{2}[Approx]}}}}}$

_____________________♡______________________