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katrin [286]
2 years ago
9

A city sewer pipe has a diameter of 7 ft and a length of 100 ft. Find the volume of the pipe. Use 3.14 as

Mathematics
2 answers:
son4ous [18]2 years ago
7 0

Answer:

3846.5 ft³

Step-by-step explanation:

<em>A pipe has the shape of a cylinder.</em>

<u>Volume of cylinder = πr²h</u>

<em>radius (r) = 7/2 = 3.5</em>

<em>height (h) = 100</em>

<em>π = 3.14</em>

Volume of cylinder = πr²h

Volume = 3.14 x (3.5)² x 100

Volume = 3846.5 ft³

Therefore, the volume of the pipe is 3846.5 ft³.

!!

Advocard [28]2 years ago
7 0

Answer:V =3846.5\ ft^3

Step-by-step explanation:

As we do not know the internal radius of the pipe, then to calculate its volume we assume that the pipe is full of water.

This means that the volume of the pipe is the volume of a cylinder with radius r = \frac{7}{2}\ ft  and length  h = 100\ ft

The volume of a cylinder is calculated using the following formula:

V =\pi r^2h

Then the volume is:

V =(3.14)(3.5)^2(100)

V =3846.5\ ft^3

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Amiraneli [1.4K]
Semi monthly means 2 times per month
assume that pay is at beginning and middle of month (doesn't matter, but  makes it easier for me)

so 12 months
2 times per month
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I WILL GIVE YOU BRAINLY PLSS <br><br><br> Worth 19 points
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Answer:

942

Step-by-step explanation :

so your d is 300 so your r = 300/2= 150  

a=3.14*r*r= 3.14*150*150= 70650

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_________________________________________________

OR

The curved surface area of solid cylinder is  

 

As we are given that:

Diameter of solid cylinder = 8 cm

Length or Height o solid cylinder = 140 cm

Formula used to calculate the curved surface area of cylinder is:2n x h

Curved surface area of cylinder =2r x h  

where,

r = radius of cylinder

h = height or length of cylinder

Radius of cylinder =  daimeter

Now putting all the given values in above formula, we get:

Curved surface area of cylinder =  2x 22/7 x 140cm

Curved surface area of cylinder = 3520cm^{2}

Therefore, the curved surface area of solid cylinder is3520cm^{2}

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3 years ago
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27% of what number is 162?
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Take it like this
27% of x = 162
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Answer:

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Step-by-step explanation:

we have

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y=-3x^{2} +5 -----> equation B

solve by substitution

substitute equation B in equation A

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solve for x

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x^{2}=2

x=\pm\sqrt{2}

<em>Find the value of y</em>

y=-3x^{2} +5

For x=\sqrt{2} ----> y=-3(\sqrt{2})^{2} +5=-1

For x=-\sqrt{2} ----> y=-3(-\sqrt{2})^{2} +5=-1

therefore

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(\sqrt{2},-1),(-\sqrt{2},-1)

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b, c, e

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