Question

surface area of a cylinder?

Answer 1

Surface Area = 2(pi r 2) + (2 pi r)* h

Answer 2

a tin soup is in the shape of a cylinder. it has a radius of 3cm and its height is 12cm. the tin has a label which fits exactly around the cylinder with no overlap. calculate the area of the label with 3 significant figures.

Answer 3

\(\Large{2 \pi rh+2\pi r^2}\)

Answer 4

2(pi 3^2)+(2pi 3)x12

Answer 5

what does the arrow mean that goes upwards?

Answer 6

Cylinder: Two circles and the curved surfaces

Area of Circle: pi*r^2
Area of curved surface: circumference of ^ circle * height of cylinder

circumference: 2*pi*r
so area of curved surface: 2*pi*r*h

Total area: 2*pi*r^2 + 2*pi*r*h
=2*pi*r(r+h)

Answer 7

The ^ means to the power of e.g. 5^2 = 25

Answer 8

oh thanks!

Answer 9

In your question, the label is the area of the 'curved surface'. Which we showed to be 2*pi*r*h

Answer 10

thank you @apple_pi

Answer 11

sure, anytime