For all you people who know math.........?

Question

What is the formula to find the surface area of a cylinder.?
What is it? If you answer correctly you get 10 pnts. C'mon this is easy this is basically like a free 10 pnts! Just answer the question correctly. And be the first one to answer the question correctly .

Answer 1

Surface Area of a Cylinder = 2 pi r 2 + 2 pi r h


r=radius
h=height

note: the 2 after the 2 pi r is a square

Answer 2

Think of taking a cylinder apart. You have a top and a bottom which are circles.

Then you have a the side of the cylinder. If you imagine cutting off the top and bottom of a can, you could then flatten it into a rectangle. The length is equal to the circumference of the circle, and the height is the height of the cylinder. A rectangle is just l x h.

So the area of the side of the cylinder is:
= C x h
= Pi x d x h

----

However, if you need to add the top and bottom you need the area of a circle:
= Pi x r^2 (squared)

For top and bottom, you have two circles:
= 2 x Pi x r^2

So putting it all together, the 3 parts are:
= ( 2 x Pi x r^2 ) + ( Pi x d x h )

Answer 3

well if you think about it, you have 2 circles and then a rectangle with a given height and a width that corresponds to the cicumference of the circle. Therefore, if the radius of the cylinder is R and the height is H, then the surface area:
Surface area = Pi*R^2 + Pi * R^2 + H * (2 * Pi * R)

Surface area = 2 * Pi * R^2 + 2 * Pi * R * H

Surface area = 2 * Pi * R (R + H)

(where * means multiply and Pi = 3.14159)

Answer 4

The Surface Area of a cylinder is:

3.14 x Radius^2 + 3.14 x Radius^2 + (3.14 x Diameter)x Height

Answer 5

i think ht answer for dis is
say we start from here as the cylinder has two circular ends that adds up to 2 times 2 times pie dat is equal to 3.14 and the radius and add the 2 times 3.14 times radius and the height of da cylinder dat covers da lateral surface area

Answer 6

(h is the height of the cylinder, r is the radius of the cyclinder)

Surface Area = Areas of top and bottom +Area of the side

Surface Area = 2(Area of top) + (perimeter of top)* height

Surface Area = 2(pi r 2) + (2 pi r)* h This is the formula.

Answer 7

2 pi r 2+2 pi r h

Answer 8

theres no pi symbol but here goes:

2 x pi x radius^squared + 2 x pi x radius x height

cha ching! 10 pts.

Answer 9

the formula is BH which is the B= PI times radius squared and then times the height!!

Answer 10

yo,
for example: the diameter of a circle is 4, you have to find the radious, which you have to divide 4 by 2. 4/2=2
pie(3.14)times 2in the second power.
then you get the answer.
Hope it helps you!!!!!!!!