Use the formula to find the surface area of the figure. Show your work.

Question 1

Question 2

Answer:

Explanation:

We know that,

$\large {\boxed {\boxed{\bf\leadsto \: surface \: area \: of \: hemisphere \: = 3\pi {r}^(2) }}}$

Here,

Now

$\large \sf\leadsto3 * (22)/(7) * 11 {}^(2)$

$\large \sf\leadsto3 * (22)/(7) * 121$

$\large \sf\leadsto \: (66)/(7) * 121$

$\large \sf\leadsto (7986)/(7)$

$\boxed{\large \bf\leadsto1140.8 \: {ft}^(2) }$

Question 3

Formula Used:-

$\qquad \hookrightarrow{ \underline{ \overline{ \boxed{ \sf{Surface \: Area =3\pi {r}^(2) }}}}}\\$

$\sf \longrightarrow \: Surface \: Area =3\pi {r}^(2) \: ) \\$

$\sf \longrightarrow \: Surface \: Area =3 * (22)/(7) * {r}^(2) \: \\$

$\sf \longrightarrow \: Surface \: Area =3 * (22)/(7) * {11}^(2) \: \\$

$\sf \longrightarrow \: Surface \: Area =3 * (22)/(7) * 11 * 11 \: \\$

$\sf \longrightarrow \: Surface \: Area = (3 * 22 * 11 * 11)/(7) \: \\$

$\sf \longrightarrow \: Surface \: Area = (66 * 11 * 11)/(7) \: \\$

$\sf \longrightarrow \: Surface \: Area = (66 * 121)/(7) \: \\$

$\sf \longrightarrow \: Surface \: Area = (7986)/(7) \: \\$

$\sf \longrightarrow \: Surface \: Area = 1140.8 \: {ft}^(2) \: \\$

______________________________________________

Therefore, Surface Area of Hemisphere is 1140.8 ft²

Please log in or register to add a comment.