Question about Gateway FPD1975W 19" LCD Monitor

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30" diameter? Radius is 15" (half of diameter).

30" circumference (distance around) is a little more complicated...

The number is the ratio of the circumference of a circle to the diameter. The value of is approximately 3.14159265358979323846...The diameter of a circle is twice the radius. Given the diameter or radius of a circle, we can find the circumference. We can also find the diameter (and radius) of a circle given the circumference. The formulas for diameter and circumference of a circle are listed below. We roundwhat is the radius of a 30 - pi.gifsrc="http://i.fixya.net/uploads/images/pi.gif" alt="pi.gif" class="h_mi" /> to 3.14 in order to simplify our what is the radius of a 30 - diam_formula.gif

Posted on Nov 17, 2009

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What class are you in? Is this your home work?
Anyway, You should know that

Circumference = 2 x pie x radius
therefore radius - circumference / 2 x pie
in this case
radius = 30 x 7 / 2 x 22
= 210 / 44
Now you can calculate that fraction.

Posted on Nov 17, 2009

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Posted on Jan 02, 2017

Assuming you are correct that the radius is 2' 6" and not the diameter.

Convert the inches to centimetres

1" = 2.54 Cms

Radius = 2' 6" = 30" X 2.54 = 76.2 Cms

Height = 5' 2" = 62" X 2.54 = 157.48 Cms

Volume of cylinder = Pi x radius squared x height

3.142 x 76.2 x 76.2 x 157.48 = 2,873,038.9 cc

Divide by 1000 to find how many litres (interest note 1000cc car engine is 1 litre)

2,873,039 cc / 1000 = 2,873 litres

Convert the inches to centimetres

1" = 2.54 Cms

Radius = 2' 6" = 30" X 2.54 = 76.2 Cms

Height = 5' 2" = 62" X 2.54 = 157.48 Cms

Volume of cylinder = Pi x radius squared x height

3.142 x 76.2 x 76.2 x 157.48 = 2,873,038.9 cc

Divide by 1000 to find how many litres (interest note 1000cc car engine is 1 litre)

2,873,039 cc / 1000 = 2,873 litres

Nov 08, 2017 | The Office Equipment & Supplies

V=?(r^2)h

Where ?=3.14

r^2 is radius square. You have 100 diameter. So 50 is the radius. 50^2=2500

h is height or your depth. When you do your calculations make sure all your measurements are in yards. Meaning radius in yards and depth in yards.

Where ?=3.14

r^2 is radius square. You have 100 diameter. So 50 is the radius. 50^2=2500

h is height or your depth. When you do your calculations make sure all your measurements are in yards. Meaning radius in yards and depth in yards.

Apr 18, 2017 | The Office Equipment & Supplies

Radius? What kind of conical pyramid is this?

Apr 13, 2016 | Office Equipment & Supplies

Let's see... the volume of a 1 foot section is

Pi * radius squared * 12 in (for cubic inches)

3.141 x .375 x.375 * 12 = 5.29 cu in

600 feet therefore has 3179.25 cu in volume

since we know (from google) that 1 pint = 28.875 cu in

Sso in 600 feet of pipe we would expect 110.1 pints of fluid.

@ 30% of volume, you will need 33 pints or 4.12 gallons of antifreeze....

http://www.google.com/ is your friend

Pi * radius squared * 12 in (for cubic inches)

3.141 x .375 x.375 * 12 = 5.29 cu in

600 feet therefore has 3179.25 cu in volume

since we know (from google) that 1 pint = 28.875 cu in

Sso in 600 feet of pipe we would expect 110.1 pints of fluid.

@ 30% of volume, you will need 33 pints or 4.12 gallons of antifreeze....

http://www.google.com/ is your friend

Feb 03, 2015 | Heating & Cooling

I don't know what units you're working in, maybe millimeters or inches? Anyway if those are the actual inside dimensions of a pipe or cylinder shape you measured, then the volume should be about 62,800,000 cubic units. Hope that helps, Buzzie.

Sep 02, 2014 | Plumbing

look up inside diameter of your 2' pipe

area inside a circle = 3.1415 (pi) x radius squared

for example if inside diameter of pipe is 1.75", then radius is half or .875

radius squared is .7656 x 3.1415 = 2.4 square inches

160 feet pipe = 1920 inches

2.4 square inches x 1920 = 4618 cubic inches

Then convert cubic inches into gallons:

http://www.metric-conversions.org/volume/cubic-inches-to-gallons.htm

If water is hot, then that can affect final calculation

Gene

area inside a circle = 3.1415 (pi) x radius squared

for example if inside diameter of pipe is 1.75", then radius is half or .875

radius squared is .7656 x 3.1415 = 2.4 square inches

160 feet pipe = 1920 inches

2.4 square inches x 1920 = 4618 cubic inches

Then convert cubic inches into gallons:

http://www.metric-conversions.org/volume/cubic-inches-to-gallons.htm

If water is hot, then that can affect final calculation

Gene

Aug 26, 2014 | Water Heaters

It will hold ~1175 gallons assuming it is filled to 24" deep. The formula is pi x radius x radius x depth x 7.48.

John

John

Mar 14, 2011 | Intex "" Metal Frame Pool Set (56998e)...

(1/3) x pi x radius2 x height x density = pounds

where ::

radius = radius of base in inches

density = pounds per cubic inch

height = height in inches

(or you could use feet, meters, cm, mm for radius & height and use kg for density or wahtever units you wish as long as the units are consistent)

Charlie

where ::

radius = radius of base in inches

density = pounds per cubic inch

height = height in inches

(or you could use feet, meters, cm, mm for radius & height and use kg for density or wahtever units you wish as long as the units are consistent)

Charlie

Feb 22, 2011 | American Standard Plumbing

A pipe can be seen as two cylinders, one of "air" sitting inside the other, in this case lead.

To get the volume of a pipe you thus subtract the volume of the "air" cylinder from that of the lead cylinder.

Volume of a cylinder = area of circular cross section (or pi times square of the radius) times the height (or length) => ? * r2 * h

Volume of a pipe = Volume of cylinder 1 (outer diameter) - volume of cylinder 2 (inner diameter).

In this case; Volume of outer cylinder => inner diameter 1/2" (0.5") + pipe thickness 1/4" (0.25") = 3/4" (0.75") divided by 2 to get radius = 0.375".

3.14 (?) * 0.375 * 0.375 * 120(10 feet) = 53.01438 in3

Volume of inner cylinder => inner diameter 1/2" (0.5") divided by 2 to get radius = 0.25".

3.14 (?) * 0.25 * 0.25 * 120(10 feet) = 23.56194 in3

Volume of lead in this pipe = 53.01438 - 23.56194 = 29.45244 in3

Hope this helps ;)

To get the volume of a pipe you thus subtract the volume of the "air" cylinder from that of the lead cylinder.

Volume of a cylinder = area of circular cross section (or pi times square of the radius) times the height (or length) => ? * r2 * h

Volume of a pipe = Volume of cylinder 1 (outer diameter) - volume of cylinder 2 (inner diameter).

In this case; Volume of outer cylinder => inner diameter 1/2" (0.5") + pipe thickness 1/4" (0.25") = 3/4" (0.75") divided by 2 to get radius = 0.375".

3.14 (?) * 0.375 * 0.375 * 120(10 feet) = 53.01438 in3

Volume of inner cylinder => inner diameter 1/2" (0.5") divided by 2 to get radius = 0.25".

3.14 (?) * 0.25 * 0.25 * 120(10 feet) = 23.56194 in3

Volume of lead in this pipe = 53.01438 - 23.56194 = 29.45244 in3

Hope this helps ;)

Jan 27, 2011 | Computers & Internet

The surface area of the outer surface is the circumference of the outside of the pipe times its length. So, if OR is the radius of the outside of the pipe and SO is the outer surface area,

SO = 2 * pi * OR * 14

Similarly, the surface area of the outer surface is SI = 2 * pi * IR *14 (if SI is the inner surface area and IR is the radius of the inside of the pipe.

The question states that the difference between the outside surface area and the inside surface area is 88 sq. cm:

SO - SI = 88 ; substituting:

(2 * pi * OR * 14) - (2 * pi * IR * 14) = 88 ; factoring

(2 * pi * 14) (OR - IR) = 88 ;dividing both sides by 2*pi*14

(OR - IR) = 88/(2 * pi) = 88/(2 * 3.14159*14) = 1.00

So, the outside radius is 1 cm more than the inside radius.

It's not clear if the volume stated is the volume of the metal in the pipe or the volume of air inside the pipe, so I will solve it both ways:

If volume of 176cc is of the air inside, the formula for this volume is 14 * pi * IR *IR

176 = 14 * 3.14159 * IR * IR ; dividing both sides by 14 * 3.14159

176/(14 * 3.14159) = IR * IR ; doing the arithmetic

4 = IR * IR ; taking the square root of both sides

sqrt(4) = IR

**IR = 2 cm**

substituting back into the first equation, the OR is 1cm more than the IR, so

**OR = 3 cm**

If volume of 176cc is of the iron in the pipe, the formula for that volume is the difference between the volume of the outside of the pipe and the volume of the inside of the pipe, or

(14 * pi * OR * OR) - (14 * pi * IR * IR) = 176 ; factoring

(14 * pi) ((OR * OR) - (IR * IR)) = 176 ; dividing both sides by 14 * pi

((OR * OR) - (IR * IR)) = 176/(14 * 3.14159) = 4

but, since OR is 1 cm more than IR (from above), we can substitute OR = IR + 1

and OR * OR = (IR + 1) * (IR + 1) = (IR*IR) + 2*IR +1

So, ((OR * OR) - (IR * IR)) = 4 becomes

(IR*IR) + 2*IR +1 - (IR*IR) = 4 ; simplifying (IRsquared - IRsquared = 0)

2*IR + 1 = 4 ; subtract 1 from both sides

2*IR = 3 ; divide both sides by 2

IR = 3/2 ;

**IR = 1.5cm**

**OR = 2.5cm**

SO = 2 * pi * OR * 14

Similarly, the surface area of the outer surface is SI = 2 * pi * IR *14 (if SI is the inner surface area and IR is the radius of the inside of the pipe.

The question states that the difference between the outside surface area and the inside surface area is 88 sq. cm:

SO - SI = 88 ; substituting:

(2 * pi * OR * 14) - (2 * pi * IR * 14) = 88 ; factoring

(2 * pi * 14) (OR - IR) = 88 ;dividing both sides by 2*pi*14

(OR - IR) = 88/(2 * pi) = 88/(2 * 3.14159*14) = 1.00

So, the outside radius is 1 cm more than the inside radius.

It's not clear if the volume stated is the volume of the metal in the pipe or the volume of air inside the pipe, so I will solve it both ways:

If volume of 176cc is of the air inside, the formula for this volume is 14 * pi * IR *IR

176 = 14 * 3.14159 * IR * IR ; dividing both sides by 14 * 3.14159

176/(14 * 3.14159) = IR * IR ; doing the arithmetic

4 = IR * IR ; taking the square root of both sides

sqrt(4) = IR

substituting back into the first equation, the OR is 1cm more than the IR, so

If volume of 176cc is of the iron in the pipe, the formula for that volume is the difference between the volume of the outside of the pipe and the volume of the inside of the pipe, or

(14 * pi * OR * OR) - (14 * pi * IR * IR) = 176 ; factoring

(14 * pi) ((OR * OR) - (IR * IR)) = 176 ; dividing both sides by 14 * pi

((OR * OR) - (IR * IR)) = 176/(14 * 3.14159) = 4

but, since OR is 1 cm more than IR (from above), we can substitute OR = IR + 1

and OR * OR = (IR + 1) * (IR + 1) = (IR*IR) + 2*IR +1

So, ((OR * OR) - (IR * IR)) = 4 becomes

(IR*IR) + 2*IR +1 - (IR*IR) = 4 ; simplifying (IRsquared - IRsquared = 0)

2*IR + 1 = 4 ; subtract 1 from both sides

2*IR = 3 ; divide both sides by 2

IR = 3/2 ;

Jan 11, 2011 | Mathsoft StudyWorks! Mathematics Deluxe...

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