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exis [7]
2 years ago
8

question 8(multiple choice worth 5 points) (03.05 mc) a cylindrical well is 25 meters deep and has a diameter of 1.8 meters. app

roximately how many cubic meters of soil were dug out to make the well? (use π
Mathematics
1 answer:
tresset_1 [31]2 years ago
3 0

63.585 cubic meters of soil were dug out to make the well.

<h3>How to find the how many cubic meters of soil were dug out to make the well?</h3>

given that

a cylindrical well is 25 meters deep and has a diameter of 1.8 meters.

height of cylinder is 25 meters.

radius of the cylinder is 0.9 meters.

now find the cubic meters of soil were dug out to make the well.

now volume of the cylinder is

volume= \pi \: r {}^{2} h

volume = \frac{ 22}{7}  \times  {0.9}^{2}  \times 25

volume=3.14 \times 0.81\times 25

volume=2.5434 \times 25

volume=63.585

Hence, total cubic meters of soil were dug out to make the well is 63.585{m}^{3}

Learn more about volume of cylinder, refer:

brainly.com/question/24159177

#SPJ4

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Farmer Ed has 8,000 meters of fencing &amp; wants to enclose a rectangular plot that borders a river. If farmer Ed does not fenc
attashe74 [19]

Answer:

largest area that can be enclosed = 8,000,000 m²

Step-by-step explanation:

Since it is a rectangle plot, the area is expressed as; A = xy, where x is length and y is width.

Because it is next to the river, he only needs to fence three sides, so amount of fencing; F = x + 2y.

Since we know the amount of fencing available is 8000m, we get:

8000 = x + 2y

solving for x, we have;

x = 8000 - 2y

substitute 8000 - 2y for x into the area equation to give;

A = (8000 - 2y)y distribute

A = -2y² + 8000y

Now, due to the negative sign next to 2, this will be a parabola which opens down, meaning that the point of maximum area will be at the vertex,

Thus; y = -b/2a = -8000/[2(-2)] = 2000

x = 8000 - 2(2000) = 4000

A = 4000(2000) = 8,000,000 m²

8 0
4 years ago
Hurry please!
muminat

Answer:

Johnny is correct because irrational numbers never end

3 0
3 years ago
!!!!!!!!!!!!!!!100100100100100pts!!!!!!!!!!!!!!!!!!!!!!!!!!
Alex_Xolod [135]
Answers

1. B) 31
2. B) 4
3. A) 15
4. D) 24
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2 years ago
The sum of two numbers is 53 . The larger number is 9 more than the smaller number. What are the numbers?
Illusion [34]

x + y = 53

x -y = 9  Adding both equations

2x = 62

x = 31 y = 22


6 0
3 years ago
Find the angle x (in degrees) that the wheelchair ramp makes with the ground.​
iogann1982 [59]

Answer:

x=175

Step-by-step explanation:

The sum of all the degrees in a triangle is 180. First, you have to rind what the third degree of the triangle is. We will call this y.

85+90+y=180

175+y=180

y=5

The floor is flat, so it will be 180 degrees, therefore, x+y=180. We can substitute 5 in for y, so 5+x=180.

So, x would be 175.

8 0
3 years ago
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