Question

The radius of a hemisphere where is 7 cm find the curve surface area .

Answer 1

Answer:

answer is 44cm^2

because c. s. a of hemisphere=2πr square units

Answer 2

Correct Question-:

• The radius of a hemisphere where is 7 cm . Find the Curved surface area ?

AnswEr-:

• $\underline{\boxed{\star{\sf{\blue{ Curved \:Surface\:Area\:of\:Hemisphere\:=\:308cm^{2}}}}}}$

EXPLANATION-:

$\underline{\sf{\large {Given -:}}}$

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

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

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

• $\implies {\large{\sf{2 \times \dfrac{22}{7} \times 49}}}$

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

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

• $\implies {\large{\sf{Curved\:Surface\:Area\:308cm^{2}}}}$

Hence,

• $\underline{\boxed{\star{\sf{\blue{ Curved \:Surface\:Area\:of\:Hemisphere\:=\:308cm^{2}}}}}}$

_____________________♡______________________