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What is the area of a circle that has a diameter of 5 millimeters?
a(r) = 2pi*r^2 and d = 2r 5 = 2r => r = 5/2 a(r) = 2pi*(5/2)^2 a(r) = 2pi*25/4 a(r) = 25pi/2 or, in decimal form, 39.2699 millimetres2
What is the radius if the circumference is 16 feet?
Circumference = 2*pi*raduis 16 = 2*pi*r divide both sides by 2pi 16/2pi = r 8/pi = radius
What is the area of a circle with a circumference of 410 meters?
Circumference = 2pi*r 410 = 2pi*r r = 205/pi A = pi*r^2 A = pi*(205/pi)^2 A = 205^2/pi metres A = 42 025/pi metres
What is the surface area of a cylinder with a radius of 5 and a height of 12?
The formula for surface area of a cylinder is (2pi * r^2) + (2pi * r * h). Substituting your values in, the surface area would be 170pi.
How do you determine the circumference of a circle if the radius is given?
Use this formula where r is the radius: C = 2Pi(r)
Is 2Pi r the same as Pi r squared?
No. 2Pi r is equal to Pi d, though.
Formula of r form c equals 2pi r?
The circumference of a circle C is 2Pixr So solving for r we have C/2Pi=r
What is the area of a circle that has a diameter of 5 millimeters?
a(r) = 2pi*r^2 and d = 2r 5 = 2r => r = 5/2 a(r) = 2pi*(5/2)^2 a(r) = 2pi*25/4 a(r) = 25pi/2 or, in decimal form, 39.2699 millimetres2
What is the formula of area of cylinder?
Surface area you mean? Then 2pi*r2 + 2pi*r*h where h=height and r=radius
What is 2pi r?
it is the formula of circumference of circle
What is the circumference of a circle when the area is 36 pi?
To convert area into circumference, take the two formulas for circles--circumference and area: C=2pi*r A=pi*r^2 Now, isolate the common variable (r) in the second equation. r=sqrt(A/pi) Now you can substitute this in for "r" in the first equation to find circumference C=2pi*sqrt(A/pi) C=2pi*sqrt(36pi/pi) pi cancels out C=2pi*sqrt(36) C=2pi*6 C=12pi
What is the radius of a circle with a circumference of 26.69 meters?
Circumference = 2pi*r 26.69/2pi = 4.248m (rounded to three decimal places)
What is the surface area of a cylinder with 8 inch radius and 30 inch height?
2 * area of circle + circumference * height 2 * pi*r^2 + 2pi*r * h 2pi*8^2 + 2pi*8*30 128pi + 480pi 608pi
How do you find the radius of a cylinder if the height is 32 feet and the circumference of the base is 135 feet?
C = 2(pi)(r) so that r = C/(2pi) = 135/(2pi) ≈ 21.5 ft.
What is the radius if the circumference is 16 feet?
Circumference = 2*pi*raduis 16 = 2*pi*r divide both sides by 2pi 16/2pi = r 8/pi = radius
What is the area of a circle with a circumference of 410 meters?
Circumference = 2pi*r 410 = 2pi*r r = 205/pi A = pi*r^2 A = pi*(205/pi)^2 A = 205^2/pi metres A = 42 025/pi metres
It takes ten identical pieces to form a circular track for a pair of toy racing cars If the inside of each piece is 3.4 inches shorter than the outside arc what is the width of the track?
Length of outer track = sum of length of 10 pieces = circumference of the outer circleif R is the Radius of outer circle then...Circumference of the outer track = 2pi*RSimilarly the circumference of the inner track (with radius r) = 2pi*rlength of each outer piece is 3.4 inch more than length of inner pieceSo total outer length is 10*3.4 =34 inches more than the inner length.=> Outer Circumference - Inner Circumference = 34 inches=> 2pi*R - 2pi*r = 34=> 2pi(R -r) = 34=> R-r = 34/2pi = 5.41 inches=> R-r = Width of the track = 5.41 inches1 year ago
