Question

Write the surface area of the following
figure.​

Answer 1

Answer:

Answer 26.14

Step-by-step explanation:

answer 26.14

Answer 2

Answer:

the surface area of the following  figure is ​ 103.62 $cm^{2}$

Step-by-step explanation:

Let the Diameter of the hemisphere be AB

and the center be O

Let The perpendicular be CO

As shown in the figure,

Triangle COB is a right angled triangle

CB (5) is the hypotenuse , CO(4) is the height and OB is the base

By using the Pythagoras Theorem  

$(hypotenuse)^{2}$ = $(Base)^{2} + (Height)^{2}$

$(CB)^{2} = (OB)^{2} + (CO)^{2}$

$(5)^{2} = (OB)^{2} + (4)^{2}$

25 =      $(OB)^{2}$ + 16

$(OB)^{2}$ = 25-16  = 9

OB = 3

So, The Radius of hemisphere OB = 3 cm

Curved surface area of Hemisphere = 2$\pi r^{2}$

                                                           = 2* 3.14 * 3 * 3 = 56.52 $cm^{2}$

Curved surface area of Cone = $\pi$rl

                                                 = 3.14 * 3 * 5 = 47.1 $cm^{2}$

Surface Area of the given figure=

Curved surface area of Hemisphere + Curved surface area of Cone

=56.52 $cm^{2}$ + 47.1 $cm^{2}$

=103.62 $cm^{2}$

To learn more about Hemisphere from the link below

https://brainly.in/question/143176

To learn more about surface area of Cone from the link below

https://brainly.in/question/8787683

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