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ruslelena [56]
3 years ago
12

Surface area of a half pipe if it is 7m

Mathematics
2 answers:
Monica [59]3 years ago
7 0

Answer:

Radius = 2.5 m Length = 7 m Half cylinder formula- ½ (pi r^2) + (2 pi R h) Pi x 2.5^2 + 2 x pi x 2.5 x 7

129.5906969 x .5 = 64.795348 m^2 The surface area of the half pipe is 65 m^2.


zloy xaker [14]3 years ago
6 0

Answer:


Step-by-step explanation:

You do not have a complete question. I do not know the dimensions of the half pipe nor the deck. I will assign letters to these. Hopefully that will help.  

R = radius of the pipe  

L = length of the pipe  

W = width of deck  

l = length of deck  

area of the half pipe is the circumference of the pipe times its length.  

Area-half-pipe = pi * R * L  

Area of the deck = W * l  

If the two decks have the same dimensions then double this number and add them up.  

If the half-pipe has a flat cover its area is 2*R*L  

Then add all these up.  

Hope this helps.

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4 years ago
What is the surface area for this design?
Umnica [9.8K]

Answer:

Surface Area = 157 in^2

Step-by-step explanation:

Surface area is the area of each side added together.

Front = Trapezoid =  <u>b1 + b2</u> * h          <u> 5 + 9 </u>  *  5   = 27.5              

                                        2                        2                              

Back = Trapezoid =  <u>b1 + b2</u> * h           <u> 5 + 9 </u>  *  5   = 27.5               27.5

                                        2                        2                                        27.5

Right = Rectangle = l * w                      6.4 * 5 =  32                           32

Left = Rectangle = l * w                           5 * 5 =  25                           25

Bottom = Rectangle = l * w                     9 * 5 =  45                           45

Top = Rectangle = l * w                          5 * 5 =  25                          <u> 25     </u>

                                                                                                             157 in^2

8 0
3 years ago
A triangle has side lengths of 9 cm, 25 cm, and 33 cm. Classify it as acute, obtuse, or right.
miskamm [114]

Answer:

Obtuse.

Step-by-step explanation:

If sides are a b and c, with c the longest:

c^2 = a^2 + b^2 = Right triangle

c^2 < a^2 + b^2 = Acute     ...

c^2 > a^2 + b^2 = Obtuse  ...

33^2 = 1089

25^2 = 625

9^2 = 81

625 + 81 = 706

1089 > 706 so the triangle is obtuse.

5 0
2 years ago
Read 2 more answers
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