Question

a right cylinder has a radius of 5 and a height of 9. What is its surface area?

A. 70π units2
B. 90π units2
C. 140π units2
D. 45π units2

Answer 1

HELP!

Answer 2

2 base areas, plus the lateral area .....

Answer 3

area of a base should be simple enough; the lateral area is just the circumference of the base, times the height

Answer 4

can you write the example?

Answer 5

what do you mean?

Answer 6

what are your formulas for area and circumference of a circle?

Answer 7

formula

Answer 8

you need to learn the formulas if you havent yet ... which means you need to write them out. We will need the area of a circle, and the circumference of a circle to proceed

Answer 9

\[A = 2(\pi r^2) + 2(\pi r)h\]