## navpreet Group Title surface area of a cylinder? one year ago one year ago

1. huneya Group Title

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

2. navpreet Group Title

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.

3. jiteshmeghwal9 Group Title

$$\Large{2 \pi rh+2\pi r^2}$$

4. huneya Group Title

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

5. navpreet Group Title

what does the arrow mean that goes upwards?

6. apple_pi Group Title

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)

7. apple_pi Group Title

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

8. navpreet Group Title

oh thanks!

9. apple_pi Group Title

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

10. navpreet Group Title

thank you @apple_pi

11. apple_pi Group Title

sure, anytime