Doubling the radius doubles the circumference.
56.549 cm
Circumference of the circle: 2*pi*9 = 18*pi cm
You can divide this problem into two steps: 1) Divide the circumference by (2 x pi) to get the radius. 2) Use this radius in the standard formula for the surface area of the sphere.
The surface area of a cylinder with a radius of 6cm and a height of 9cm is 565.5 units2
56.549 cm
Doubling the radius doubles the circumference.
56.549 cm
The equation for circumference is C = 2*pi*r, where r is the radius of the circle and pi is a constant = 3.14159... Assuming that you mean a 9cm radius, the circumference is therefore: C = 2*pi*r = 2*pi*9cm = 18cm*pi = ~56.549cm
Circumference of the circle: 2*pi*9 = 18*pi cm
You can divide this problem into two steps: 1) Divide the circumference by (2 x pi) to get the radius. 2) Use this radius in the standard formula for the surface area of the sphere.
The surface area of a cylinder with a radius of 6cm and a height of 9cm is 565.5 units2
C=2*pi*r C=2*pi*9 C=18pi C=18*3.141592=56.548656...
The circumference of a circle that is 9 cm wide is: 28.274 cm
It is 28.3 cm, approx.
Circumference = 2*pi*radius Radius = Circumference/(2*pi)
The radius is 1/2 of the circumference.