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2 years ago

A cylinder has a radius of 25 ft and a height of 14 ft. What is the surface area and volume of the cylinder?

1 answer:

7 0

Surface area of cylinder = 2πrh+2πr^2
= 2*22/7*25*14 + 2*22/7*25^2
≈ 6126.11

volume of cylinder: πr^2h
= 22/7*25^2*2*14
≈27488.94

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R=3 in<br> find circumference <br> answer in terms of pi

Anit [1.1K]

Answer:

The circumference is 6π

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3 years ago

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Find three consctive postive integers such that the prodect of the median integer and the largest integer is 72

Tcecarenko [31]

Answer: 7,8,9

Step-by-step explanation:

Let the numbers be a, a+1 and a+2. Therefore, based on the question, this will be:

= (a + 1)(a + 2) = 72

a² + 2a + a + 2 = 72

a² + 3a + 2 - 72 = a

a² + 3a - 70 = 0

a² + 10a - 7a - 70 = 0

a(a + 10) - 7(a + 10)

a - 7 = 0

a = 7

Since a = 7

a + 1 = 7+1 = 8

a + 2 = 7+2 = 9

The numbers are 7,8 and 9

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2 years ago

Jessica fills a cube shaped tank that has an edge of 70 cm with water from a tap. Water flows into the tank at a rate of 7L per

daser333 [38]

The volume of the tank is (70 cm)³ = 343,000 cm³.

Now,

1 mL = 1 cm³

1 L = 1000 mL

so we convert the given rate to

$\dfrac{7\,\rm L}{1\,\rm min} \cdot \dfrac{1000\,\rm mL}{1\,\rm L} \cdot \dfrac{1\,\mathrm{cm}^3}{1\,\rm mL} = \dfrac{7000\,\mathrm{cm}^3}{1\,\rm min}$

Then the time it will take to fill up the tank is

$343,000\,\mathrm{cm}^3 \cdot \dfrac{1\,\rm min}{7000\,\mathrm{cm}^3} = \boxed{49\,\rm min}$

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1 year ago

Solve for the value of k

wel

Answer:

k=13

Step-by-step explanation:

3k+6+4k-7+90=180

7k+89=180

k=180-89/7

k=13

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2 years ago

Find the equation of a line with the given points. (Put your answers in the form y = mx + b.) (7, 3) (3, 7)

igor_vitrenko [27]

By "inspection" you can write the equation as
.. x + y = 10
Then
.. y = -x +10 . . . . . . . . the desired form

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2 years ago