what is the surface area of a cylinder?

Answer 1

Total surface area = Area of (top + lateral surface + bottom)
Area of the circular top = (pi)r^2
Area of the lateral surface = (pi)r h
Area of the circular bottom = (pi)r^2
Total surface area=(r+h)(2 pi)r

Answer 2

Imagine that your cylinder is made from two circles and one rectangular piece, which is curled up to make a tube.

The area of one of the bases (the circles) should be pi times the radius squared. So if the radius is 4, then it's 3.14 x 16.

Since you have two bases, you need to multiply that product by 2.

Now for the rectangle. One dimension of the rectangle is the height. The other is the circumference of the circle. The formula for the circumference of the circle is pi times the diameter, or pi times the radius times 2. Multiply the height times the circumference for the area of the rectangle.

Add the area of the rectangle to the area of the two bases of the cylinder.

Answer 3

its surface area is:

* Area of the top is πr2
* Area of the bottom is πr2
* Area of the side is 2πrh

Therefore without the top or bottom, the surface area is

A = 2πrh.

With the top and bottom, the surface area is

A = 2 \pi r^2 + 2 \pi r h = 2 \pi r ( r + h ).\,

Answer 4

C*h=SA
You don't count the ends of the cylinder; surface area refers to the SIDES of the cylinder.

Answer 5

2 x pi x r^2 + 2 x pi x r x h

pi = 3.14159
r = radius
h = height of cylinder

Answer 6

break it down-
two circles with equal dimensions, so 2(pi) r (squared).
One rectangle with one side equal to the height and the other side equal to the circumference of either circle, so h x 2 (pi) r .
Add that whole mess together.

Example: if a cylinder has a height of 10 and a radius of 2, then the SA= 2(3.14)x2(squared)+10x2(3.14)x2= 150.72

Answer 7

2 pi r (r + h)

Answer 8

SAcylinder = 2(pi)(r)(squared) + 2(pi)(r)(h)

Answer 9

cut the cylinder and you will get a rectangle.
height * width,

where width = diameter_of_cylinder * pi

Answer 10

Quite a bit.
But I'm not as clever as you lot.